:root {
        --bg-base: #090d16;
        --bg-surface: #131c2e;
        --text-main: #f1f5f9;
        --text-muted: #64748b;
        --primary: #3b82f6;
        --primary-glow: rgba(59, 130, 246, 0.15);
        --success: #10b981;
        --danger: #f43f5e;
        --warning: #f59e0b;
        --border: #1e293b;
        --card-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.3);
        --loader-bg: #090d16;
        --alarm-row-bg: #45121e;
        --alarm-row-text: #fecdd3;
        --accent-surface: rgba(59, 130, 246, 0.08);
        --tab-active-bg: #1e3a5f;
        --input-bg: #0f172a;
        --overlay-bg: rgba(9, 13, 22, 0.92);
      }

      html[data-theme="light"] {
        --bg-base: #f8fafc;
        --bg-surface: #ffffff;
        --text-main: #0f172a;
        --text-muted: #94a3b8;
        --border: #e2e8f0;
        --card-shadow: 0 4px 18px -4px rgba(148, 163, 184, 0.12);
        --loader-bg: #f8fafc;
        --alarm-row-bg: #ffe4e6;
        --alarm-row-text: #9f1239;
        --accent-surface: rgba(59, 130, 246, 0.05);
        --tab-active-bg: #dbeafe;
        --input-bg: #f1f5f9;
        --overlay-bg: rgba(248, 250, 252, 0.94);
      }
      html {
        overflow-y: scroll; /* forces scrollbar to prevent layout shift */
        height: 100%; /* ensures full viewport coverage */
      }
      * {
        box-sizing: border-box;
        margin: 0;
        font-family:
          -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
          Arial, sans-serif;
      }

      .icon {
        width: 1.1em;
        height: 1.1em;
        display: inline-block;
        vertical-align: -0.18em;
        fill: none;
        stroke: currentColor;
        stroke-width: 1.8;
        stroke-linecap: round;
        stroke-linejoin: round;
      }

      .school-logo-button {
        align-self: flex-start;
        padding: 0.2rem;
        border: 1px solid transparent;
        border-radius: 10px;
        background: transparent;
        cursor: pointer;
        transition: border-color 0.25s ease, box-shadow 0.25s ease;
      }

      .school-logo-button:hover,
      .school-logo-button:focus-visible {
        border-color: var(--primary);
        box-shadow: 0 0 14px var(--primary-glow);
        outline: none;
      }

      .app-page {
        width: 100%;
        max-width: 1300px;
        margin: 0 auto;
      }

      .page-header {
        margin-bottom: 1.5rem;
      }

      .simulation-card {
        max-width: 640px;
        margin: 0 auto;
      }

      .simulation-preview {
        margin-top: 1.5rem;
      }

      .simulation-preview-title {
        max-width: 1300px;
        margin: 1.75rem auto 0;
        color: var(--text-muted);
        font-size: 0.85rem;
        text-transform: uppercase;
        letter-spacing: 0.08em;
      }

      .simulation-preview-label {
        text-transform: uppercase;
        font-size: 0.8rem;
        letter-spacing: 0.08em;
        font-weight: 700;
      }

      .simulation-card h3 {
        margin-bottom: 0.5rem;
      }

      .simulation-card > p {
        margin-bottom: 1.5rem;
      }

      .simulation-badge {
        display: inline-block;
        margin-bottom: 1rem;
        padding: 0.35rem 0.7rem;
        border: 1px solid var(--warning);
        border-radius: 8px;
        color: var(--warning);
        font-size: 0.75rem;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.06em;
      }

      .simulation-sensor {
        margin: 1.25rem 0;
        color: var(--primary);
        font-weight: 700;
      }

      .simulation-sensor-select {
        width: 100%;
        margin-top: 0.35rem;
        padding: 0.85rem 1rem;
        border: 1px solid var(--border);
        border-radius: 10px;
        background: var(--input-bg);
        color: var(--text-main);
        font-size: 1rem;
        font-weight: 600;
      }

      .simulation-connection {
        margin: -0.75rem 0 1.25rem;
        color: var(--success);
        font-size: 0.82rem;
        font-weight: 600;
      }

      .simulation-range-info {
        display: flex;
        justify-content: space-between;
        gap: 1rem;
        margin-bottom: 1rem;
        color: var(--text-muted);
        font-size: 0.82rem;
      }

      .simulation-range-info strong {
        color: var(--text-main);
      }

      @media (max-width: 600px) {
        .simulation-range-info {
          align-items: flex-start;
          flex-direction: column;
          gap: 0.35rem;
        }
      }

      .simulation-value-row {
        display: flex;
        align-items: baseline;
        justify-content: space-between;
        gap: 1rem;
      }

      .simulation-value-row output {
        color: var(--text-main);
        font-size: 2.5rem;
        font-weight: 800;
        font-variant-numeric: tabular-nums;
      }

      #simulationTempRange {
        width: 100%;
        margin: 1rem 0 1.5rem;
        accent-color: var(--primary);
      }

      .simulation-random-btn {
        width: 100%;
        justify-content: center;
        margin-top: 0.75rem;
      }

      .simulation-random-btn.active {
        border-color: var(--danger);
        color: var(--danger);
      }

      h2 .icon,
      h3 .icon {
        margin-right: 0.25rem;
      }

      /* ADD SPECIFIC TRANSITIONS ONLY WHERE NEEDED */
      .theme-btn,
      .auth-tab,
      .auth-btn,
      .sensor-mini-card,
      .log-action-btn {
        transition:
          background-color 0.25s ease,
          border-color 0.25s ease,
          color 0.25s ease,
          box-shadow 0.25s ease;
      }

      body {
        background-color: var(--bg-base);
        color: var(--text-main);
        margin: 0;
        padding: 0;
        min-height: 100vh;
        height: 100%; /* added – ensures body fills viewport */
        display: flex;
        flex-direction: column;
        align-items: center;
      }
      /* Progress counter */
      .progress-counter {
        font-size: 0.8rem;
        font-weight: 700;
        color: var(--primary);
        margin-top: 0.5rem;
        display: block;
        text-align: center;
        opacity: 0;
        animation: fadeSlideUp 0.8s ease-out 0.7s both;
      }
      /* ── MINIMAL LOADING SCREEN ── */
      #loading-screen {
        position: fixed;
        inset: 0;
        background-color: var(--bg-base); /* solid background, no gradient */
        z-index: 9999;
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        padding: 2rem;
        opacity: 1;
        transition:
          opacity 0.6s ease,
          visibility 0.6s;
        overflow: hidden;
      }

      #loading-screen.fade-out {
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
      }

      /* Container – no z-index needed, no pseudo elements */
      .loader-container {
        max-width: 480px;
        width: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 0.5rem;
        animation: fadeSlideUp 0.8s ease-out both; /* single, subtle entrance */
      }

      /* Logos – side by side, small, no floating */
      .loader-logos {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 1.5rem;
        margin-bottom: 0.3rem;
      }

      .loader-logo-school {
        width: 80px;
        height: 80px;
        object-fit: contain;
      }

      .loader-logo {
        width: 120px;
        height: 120px;
        object-fit: contain;
      }
      .loader-status {
        font-size: 0.8rem;
        color: var(--text-muted);
        margin-top: 0.75rem;
        animation: pulseText 2s ease-in-out infinite;
      }
      @keyframes pulseText {
        0%,
        100% {
          opacity: 0.6;
        }
        50% {
          opacity: 1;
        }
      }

     .loader-developer {
  width: 100%;
  text-align: center;
  margin: 0.8rem 0 1.2rem;
}
.dev-label {
  display: block;
  font-weight: 500;
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.6rem;
}
.dev-columns {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  margin-bottom: 0.3rem;
}
.dev-col {
  text-align: left;
  line-height: 1.6;
}
.dev-name {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
}
.dev-center {
  margin-top: 0.2rem;
}
.dev-center .dev-name {
  font-weight: 700;
}

      /* School name – */
      .loader-school {
        font-size: 0.75rem;
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 0.08em;
        color: var(--text-muted);
        max-width: 400px;
        line-height: 1.4;
      }
      .loader-project {
        font-size: 3rem; /* you can keep or adjust */
        font-weight: 800;
        letter-spacing: -0.03em;
        /* Shine + colour gradient */
        background:
          linear-gradient(
              120deg,
              transparent 0%,
              rgba(255, 255, 255, 0.25) 40%,
              rgba(255, 255, 255, 0.6) 50%,
              rgba(255, 255, 255, 0.25) 60%,
              transparent 100%
            )
            0 0 / 300% 100%,
          linear-gradient(
              135deg,
              #3b82f6 0%,
              #60a5fa 30%,
              #93c5fd 50%,
              #1d4ed8 100%
            )
            0 0 / 200% 200%;
        background-clip: text;
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        margin-bottom: -0.2rem;
        animation:
          shine 6s ease-in-out infinite,
          gradientShift 8s ease-in-out infinite,
          fadeSlideUp 0.8s ease-out 0.5s both;
      }
      /* Tagline – subtle */
      .loader-tagline {
        font-size: 0.9rem;
        color: var(--text-muted);
        font-weight: 500;
        letter-spacing: 0.03em;
        margin-bottom: 1.5rem;
      }

      #loading-screen.fade-out .loader-container {
        animation: loaderExit 0.5s ease-in both;
      }
      @keyframes loaderExit {
        0% {
          opacity: 1;
          transform: translateY(0) scale(1);
        }
        100% {
          opacity: 0;
          transform: translateY(-20px) scale(0.95);
        }
      }
      /* Progress bar – slim, no glow, no shimmer */
      .progress-bar-container {
        width: 200px;
        height: 3px;
        background: transparent;
        overflow: hidden;
        position: relative;
      }
      .progress-bar-fill {
        width: 30%;
        height: 100%;
        background: var(--primary);
        border-radius: 3px;
        animation: indeterminate 1.5s ease-in-out infinite;
        position: absolute;
      }
      @keyframes indeterminate {
        0% {
          left: -30%;
        }
        100% {
          left: 100%;
        }
      }

      /* ========== LIGHT MODE OVERRIDES ========== */
      html[data-theme="light"] #loading-screen {
        background-color: var(--bg-base);
      }

      /* Only essential keyframes kept */
      @keyframes fadeSlideUp {
        0% {
          opacity: 0;
          transform: translateY(12px);
        }
        100% {
          opacity: 1;
          transform: translateY(0);
        }
      }

      @keyframes fillProgress {
        0% {
          width: 0%;
        }
        100% {
          width: 100%;
        }
      }
      @keyframes shine {
        0% {
          background-position:
            100% 0,
            0% 50%;
        }
        100% {
          background-position:
            -200% 0,
            0% 50%;
        }
      }

      @keyframes gradientShift {
        0%,
        100% {
          background-position: 0% 50%;
        }
        50% {
          background-position: 100% 50%;
        }
      }
      /* ── AUTH SCREEN ── */
      #auth-screen {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: var(--bg-base);
        z-index: 8888;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 2rem;
        opacity: 1;
        transition:
          opacity 0.5s ease,
          visibility 0.5s;
      }
      #auth-screen.hidden {
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
      }
      .auth-card {
        background-color: var(--bg-surface);
        border: 1px solid var(--border);
        border-radius: 20px;
        padding: 2.5rem 2rem;
        max-width: 440px;
        width: 100%;
        box-shadow: 0 20px 50px -15px rgba(0, 0, 0, 0.4);
        text-align: center;
      }
      .auth-logo {
        width: 80px;
        height: 80px;
        object-fit: contain;
        margin-bottom: 0.75rem;
      }
      .auth-title {
        font-size: 1.6rem;
        font-weight: 800;
        letter-spacing: -0.02em;
        margin-bottom: 0.25rem;
      }
      .auth-subtitle {
        font-size: 0.85rem;
        color: var(--text-muted);
        margin-bottom: 1.75rem;
      }
      .auth-tabs {
        display: flex;
        gap: 0;
        margin-bottom: 1.5rem;
        border-radius: 12px;
        overflow: hidden;
        border: 1px solid var(--border);
      }
      .auth-tab {
        flex: 1;
        padding: 0.75rem;
        cursor: pointer;
        font-weight: 700;
        font-size: 0.9rem;
        border: none;
        background-color: var(--bg-base);
        color: var(--text-muted);
        letter-spacing: 0.03em;
        transition: all 0.2s ease;
      }
      .auth-tab.active {
        background-color: var(--primary);
        color: #ffffff;
      }
      .auth-input {
        width: 100%;
        background-color: var(--input-bg);
        border: 1px solid var(--border);
        color: var(--text-main);
        padding: 0.9rem 1rem;
        border-radius: 10px;
        font-size: 0.95rem;
        margin-bottom: 0.85rem;
        outline: none;
        text-align: left;
      }
      .auth-input:focus {
        border-color: var(--primary);
        box-shadow: 0 0 0 3px var(--primary-glow);
      }
      .password-row {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        margin-bottom: 0.85rem;
      }
      .password-row .auth-input {
        margin-bottom: 0;
      }
      .password-toggle-btn,
      .auth-link-btn {
        border: 1px solid var(--border);
        background-color: var(--bg-base);
        color: var(--text-main);
        border-radius: 10px;
        padding: 0.75rem 0.9rem;
        cursor: pointer;
        font-weight: 700;
        font-size: 0.78rem;
        white-space: nowrap;
      }
      .password-toggle-btn:hover,
      .auth-link-btn:hover {
        border-color: var(--primary);
        box-shadow: 0 0 10px var(--primary-glow);
      }
      .auth-links-row {
        display: flex;
        justify-content: flex-end;
        margin-bottom: 0.25rem;
      }
      .auth-link-btn {
        background: transparent;
        border: none;
        padding: 0;
        color: var(--primary);
        font-size: 0.82rem;
        text-decoration: underline;
        text-underline-offset: 2px;
      }
      /* ── EDIT SENSOR BUTTON (with text & outline) ── */
      .edit-sensor-btn {
        background: var(--bg-surface);
        border: 1.5px solid var(--border);
        border-radius: 20px; /* pill shape */
        color: var(--text-muted);
        cursor: pointer;
        font-size: 0.7rem;
        font-weight: 600;
        padding: 0.2rem 0.7rem;
        margin-left: 0.5rem;
        transition: all 0.2s ease;
        display: inline-block;
        line-height: 1.4;
        white-space: nowrap;
      }

      /* Hover / focus – make it pop */
      .edit-sensor-btn:hover,
      .edit-sensor-btn:focus-visible {
        border-color: var(--primary);
        background: var(--primary);
        color: #fff;
        box-shadow: 0 0 12px var(--primary-glow);
        transform: translateY(-1px);
      }

      /* Active press feedback */
      .edit-sensor-btn:active {
        transform: scale(0.95);
      }

      /* Mobile – larger tap target */
      @media (max-width: 600px) {
        .edit-sensor-btn {
          font-size: 0.8rem;
          padding: 0.3rem 0.9rem;
          border-width: 2px;
        }
      }
      .auth-btn {
        width: 100%;
        padding: 0.9rem;
        background-color: var(--primary);
        color: #fff;
        border: none;
        border-radius: 10px;
        font-weight: 700;
        font-size: 1rem;
        cursor: pointer;
        letter-spacing: 0.03em;
        margin-top: 0.5rem;
        transition: all 0.2s ease;
      }
      .auth-btn:hover {
        filter: brightness(1.1);
        box-shadow: 0 8px 25px var(--primary-glow);
        transform: translateY(-1px);
      }
      .auth-btn:active {
        transform: translateY(0);
      }
      .auth-error {
        color: var(--danger);
        font-size: 0.85rem;
        margin-top: 0.75rem;
        font-weight: 600;
        min-height: 1.2em;
      }
      .auth-success {
        color: var(--success);
        font-size: 0.85rem;
        margin-top: 0.75rem;
        font-weight: 600;
        min-height: 1.2em;
      }

      /* ── DASHBOARD (hidden until auth) ── */
      #dashboard-container {
        width: 100%;
        padding: 2rem 1.5rem;
        max-width: 1300px;
        display: none;
        flex-direction: column;
        gap: 1.5rem;
      }
      #dashboard-container.visible {
        display: flex;
      }

      /* ── HEADER ── */
      .header-controls {
        width: 100%;
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        align-items: center;
        gap: 1rem;
      }
      .header-title-group h2 {
        font-size: 1.5rem;
        font-weight: 700;
        letter-spacing: -0.02em;
        background: linear-gradient(
          to right,
          var(--text-main),
          var(--text-muted)
        );
        background-clip: text;
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
      }
      .datetime-display {
        font-size: 0.85rem;
        font-weight: 600;
        color: var(--text-muted);
        margin-top: 0.25rem;
        display: flex;
        align-items: center;
        gap: 0.5rem;
      }
      .action-buttons {
        display: flex;
        align-items: center;
        gap: 0.6rem;
        flex-wrap: wrap;
      }
      .theme-btn {
        background-color: var(--bg-surface);
        border: 1px solid var(--border);
        color: var(--text-main);
        padding: 0.55rem 1rem;
        border-radius: 10px;
        cursor: pointer;
        font-weight: 600;
        font-size: 0.85rem;
        display: flex;
        align-items: center;
        gap: 0.5rem;
        box-shadow: var(--card-shadow);
        white-space: nowrap;
      }
      .theme-btn:hover {
        border-color: var(--primary);
        box-shadow: 0 0 12px var(--primary-glow);
        transform: translateY(-1px);
      }
      .theme-btn:active {
        transform: translateY(0);
      }
      .signout-btn {
        background-color: var(--danger);
        border-color: var(--danger);
        color: #fff;
      }
      .signout-btn:hover {
        border-color: var(--danger);
        box-shadow: 0 0 16px rgba(244, 63, 94, 0.3);
      }

      /* ── SENSOR CARDS GRID ── */
      .sensor-cards-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 1rem;
      }
      .sensor-mini-card {
        background-color: var(--bg-surface);
        border: 1px solid var(--border);
        border-radius: 14px;
        padding: 1.25rem 1rem;
        text-align: center;
        cursor: pointer;
        box-shadow: var(--card-shadow);
        transition: all 0.25s ease;
        position: relative;
        overflow: hidden;
      }
      .sensor-mini-card:hover {
        border-color: var(--primary);
        box-shadow: 0 0 18px var(--primary-glow);
        transform: translateY(-2px);
      }
      .sensor-mini-card.selected {
        border-color: var(--primary);
        box-shadow: 0 0 22px var(--primary-glow);
        outline: 2px solid var(--primary);
        outline-offset: -2px;
      }
      .sensor-mini-card.alarm {
        border-color: var(--danger) !important;
        animation: pulseCard 1.5s infinite alternate;
      }
      @keyframes pulseCard {
        0% {
          box-shadow: 0 0 8px rgba(244, 63, 94, 0.2);
        }
        100% {
          box-shadow: 0 0 22px rgba(244, 63, 94, 0.55);
        }
      }
      .sensor-mini-name {
        font-size: 0.8rem;
        text-transform: uppercase;
        letter-spacing: 0.06em;
        color: var(--text-muted);
        font-weight: 700;
        margin-bottom: 0.5rem;
      }
      .sensor-mini-temp {
        font-size: 2rem;
        font-weight: 900;
        letter-spacing: -0.03em;
        font-variant-numeric: tabular-nums;
      }
      .sensor-mini-status {
        display: inline-block;
        padding: 0.25rem 0.7rem;
        border-radius: 12px;
        font-size: 0.7rem;
        font-weight: 800;
        letter-spacing: 0.05em;
        text-transform: uppercase;
        margin-top: 0.4rem;
      }
      .mini-status-normal {
        background: rgba(16, 185, 129, 0.12);
        color: var(--success);
      }
      .mini-status-warning {
        background: rgba(245, 158, 11, 0.12);
        color: var(--warning);
      }
      .mini-status-danger {
        background: rgba(244, 63, 94, 0.12);
        color: var(--danger);
      }

      /* ── MAIN DASHBOARD GRID ── */
      .dashboard {
        width: 100%;
        display: grid;
        grid-template-columns: 1fr;
        gap: 1.5rem;
      }
      @media (min-width: 768px) {
        .dashboard {
          grid-template-columns: 2fr 1fr;
        }
      }
      .card {
        background-color: var(--bg-surface);
        border: 1px solid var(--border);
        border-radius: 16px;
        padding: 1.75rem;
        box-shadow: var(--card-shadow);
      }
      .hero-card {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        text-align: center;
        position: relative;
        min-height: 300px;
        overflow: hidden;
      }
      .temp-display {
        font-size: 6rem;
        font-weight: 900;
        line-height: 1;
        margin: 0.75rem 0;
        letter-spacing: -0.04em;
        font-variant-numeric: tabular-nums;
        transition: color 0.4s cubic-bezier(0.4, 0, 0.2, 1);
      }
      .status-safe {
        color: var(--success);
        text-shadow: 0 0 30px rgba(16, 185, 129, 0.1);
      }
      .status-warning {
        color: var(--warning);
        text-shadow: 0 0 30px rgba(245, 158, 11, 0.1);
      }
      .status-danger {
        color: var(--danger);
        text-shadow: 0 0 30px rgba(244, 63, 94, 0.15);
      }
      .state-badge {
        display: inline-block;
        padding: 0.4rem 1.1rem;
        border-radius: 20px;
        font-size: 0.85rem;
        font-weight: 800;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        margin-bottom: 0.75rem;
        transition: all 0.3s ease;
      }
      .state-badge.normal {
        background-color: rgba(16, 185, 129, 0.15);
        color: var(--success);
        border: 1px solid rgba(16, 185, 129, 0.3);
      }
      .state-badge.high-heat {
        background-color: rgba(245, 158, 11, 0.15);
        color: var(--warning);
        border: 1px solid rgba(245, 158, 11, 0.3);
      }
      .state-badge.critical {
        background-color: rgba(244, 63, 94, 0.15);
        color: var(--danger);
        border: 1px solid rgba(244, 63, 94, 0.3);
        animation: pulseState 1.5s infinite alternate;
      }
      @keyframes pulseState {
        0% {
          transform: scale(1);
        }
        100% {
          transform: scale(1.05);
        }
      }
      .sidebar {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
      }
      .status-row {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 1rem 0;
        border-bottom: 1px solid var(--border);
      }
      .status-row:last-child {
        border-bottom: none;
        padding-bottom: 0;
      }
      .status-row:first-of-type {
        padding-top: 0.5rem;
      }
      .badge {
        padding: 0.35rem 0.85rem;
        border-radius: 8px;
        font-size: 0.8rem;
        font-weight: 700;
        letter-spacing: 0.03em;
        text-transform: uppercase;
      }
      .badge.online,
      .badge.connected {
        background-color: rgba(16, 185, 129, 0.1);
        border: 1px solid rgba(16, 185, 129, 0.2);
        color: var(--success);
      }
      .badge.offline,
      .badge.disconnected {
        background-color: rgba(244, 63, 94, 0.1);
        border: 1px solid rgba(244, 63, 94, 0.2);
        color: var(--danger);
      }
      .stats-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 1.25rem;
        grid-column: 1 / -1;
      }
      .stat-card {
        text-align: center;
        background-color: var(--bg-surface);
        border: 1px solid var(--border);
        border-radius: 16px;
        padding: 1.5rem 1rem;
        box-shadow: var(--card-shadow);
        position: relative;
      }
      .stat-card::before {
        content: "";
        position: absolute;
        top: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 40px;
        height: 3px;
        border-radius: 0 0 4px 4px;
      }
      #highTemp-card::before {
        background-color: var(--danger);
      }
      #lowTemp-card::before {
        background-color: var(--primary);
      }
      #avgTemp-card::before {
        background-color: var(--warning);
      }
      .stat-val {
        font-size: 2rem;
        font-weight: 800;
        margin-top: 0.6rem;
        letter-spacing: -0.02em;
        font-variant-numeric: tabular-nums;
      }
      label {
        display: block;
        color: var(--text-muted);
        font-size: 0.85rem;
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 0.05em;
        margin-bottom: 0.75rem;
      }
      input[type="number"],
      input[type="text"] {
        width: 100%;
        background-color: var(--input-bg);
        border: 1px solid var(--border);
        color: var(--text-main);
        padding: 0.85rem 1rem;
        border-radius: 10px;
        font-size: 1rem;
        font-weight: 600;
        outline: none;
      }
      input[type="number"]:focus,
      input[type="text"]:focus {
        border-color: var(--primary);
        box-shadow: 0 0 0 3px var(--primary-glow);
      }
      .alert-banner {
        grid-column: 1 / -1;
        background: linear-gradient(
          135deg,
          rgba(244, 63, 94, 0.2),
          rgba(244, 63, 94, 0.05)
        );
        border: 1px solid var(--danger);
        color: #ffffff;
        padding: 1.2rem 1.5rem;
        border-radius: 14px;
        display: none;
        font-weight: 600;
        font-size: 0.95rem;
        box-shadow: 0 10px 30px -10px rgba(244, 63, 94, 0.3);
        animation: pulseAlert 2s infinite alternate;
      }
      @keyframes pulseAlert {
        0% {
          box-shadow: 0 4px 20px -5px rgba(244, 63, 94, 0.2);
        }
        100% {
          box-shadow: 0 4px 25px 2px rgba(244, 63, 94, 0.4);
        }
      }

      /* ── LOG TABLE ── */
      .log-card {
        grid-column: 1 / -1;
        padding: 1.5rem;
        display: flex;
        flex-direction: column;
      }
      .log-header-row {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        align-items: center;
        gap: 0.75rem;
        margin-bottom: 1rem;
      }
      .log-action-btns {
        display: flex;
        gap: 0.5rem;
        flex-wrap: wrap;
      }
      .log-action-btn {
        padding: 0.5rem 1rem;
        border-radius: 8px;
        cursor: pointer;
        font-weight: 700;
        font-size: 0.8rem;
        letter-spacing: 0.03em;
        border: 1px solid var(--border);
        background-color: var(--bg-surface);
        color: var(--text-main);
        display: flex;
        align-items: center;
        gap: 0.4rem;
        transition: all 0.2s ease;
      }
      .log-action-btn:hover {
        border-color: var(--primary);
        box-shadow: 0 0 10px var(--primary-glow);
      }
      .log-table-wrapper {
        margin-top: 0.5rem;
        max-height: 360px;
        overflow-y: auto;
        overflow-x: auto;
        border: 1px solid var(--border);
        border-radius: 12px;
      }
      .log-table {
        width: 100%;
        border-collapse: collapse;
        text-align: left;
        font-size: 0.9rem;
      }
      .log-table th {
        padding: 0.85rem 0.75rem;
        font-size: 0.8rem;
        font-weight: 700;
        color: var(--text-muted);
        border-bottom: 2px solid var(--border);
        position: sticky;
        top: 0;
        background-color: var(--bg-surface);
        z-index: 1;
        white-space: nowrap;
      }
      .log-table td {
        padding: 0.8rem 0.75rem;
        font-weight: 500;
        border-bottom: 1px solid var(--border);
        font-variant-numeric: tabular-nums;
        white-space: nowrap;
      }
      .log-table tr.row-alarm {
        background-color: var(--alarm-row-bg) !important;
        color: var(--alarm-row-text) !important;
      }
      .log-table tr.row-alarm td {
        color: var(--alarm-row-text) !important;
        font-weight: 700;
        border-bottom-color: rgba(244, 63, 94, 0.2);
      }
      .text-muted {
        color: var(--text-muted);
        font-weight: 500;
      }
      h3 {
        font-weight: 700;
        letter-spacing: -0.01em;
        color: var(--text-main);
        margin: 0;
      }
      /* ── PRINT MODES ── */
      @media print {
        /* Default: hide everything */
        body * {
          visibility: hidden;
        }
        body.print-log-mode .log-card,
        body.print-log-mode .log-card * {
          visibility: visible;
        }
        body.print-map-mode #thermalMappingPage,
        body.print-map-mode #thermalMappingPage * {
          visibility: visible;
        }
        /* Show the containers themselves */
        body.print-log-mode .log-card {
          position: absolute;
          left: 0;
          top: 0;
          width: 100%;
          padding: 1rem;
          background: #fff !important;
          border: none !important;
          box-shadow: none !important;
        }
        body.print-map-mode #thermalMappingPage {
          position: absolute;
          left: 0;
          top: 0;
          width: 100%;
          padding: 1rem;
          background: #fff !important;
          /* Print thermal grid colors */
          #thermalGridContainer,
          #thermalGridContainer * {
            -webkit-print-color-adjust: exact !important;
            print-color-adjust: exact !important;
            color-adjust: exact !important;
          }
        }
        /* Optional: improve table readability */
        body.print-log-mode .log-table th {
          background: #f0f0f0 !important;
          color: #000 !important;
        }
        body.print-log-mode .log-table td {
          color: #000 !important;
        }
        body.print-log-mode .row-alarm td {
          background: #ffe4e6 !important;
          color: #9f1239 !important;
        }
      }

      /* ── RESPONSIVE ── */
      @media (max-width: 600px) {
        .temp-display {
          font-size: 3.5rem;
        }
        .stats-grid {
          grid-template-columns: repeat(3, 1fr);
          gap: 0.5rem;
        }
        .stat-val {
          font-size: 1.4rem;
        }
        .sensor-cards-grid {
          grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
        }
      }
/* ═══════════ MOBILE RESPONSIVENESS FIXES ═══════════ */

/* 1. Prevent Grid items from stretching past the viewport */
.dashboard > * {
  min-width: 0;
}

/* 2. Ensure the log table wrapper scrolls internally instead of pushing the page */
.log-table-wrapper {
  width: 100%;
  min-width: 0;
}

/* 3. Fix Header and Buttons on Mobile */
@media (max-width: 768px) {
  #dashboard-container {
    padding: 1rem; /* Reduce side padding to give more room */
    overflow-x: hidden; /* Prevent horizontal scrolling */
  }

  .header-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .action-buttons {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
    margin-top: 0.5rem;
  }

  /* Make buttons flexible so they don't cut off */
  .theme-btn {
    flex: 1 1 auto;
    justify-content: center;
  }

  /* Fix Hero Card Text Wrapping */
  .hero-card {
    padding: 1.5rem 1rem;
  }
  
  #heroSensorLabel {
    display: inline-block;
    max-width: 100%;
    word-wrap: break-word;
  }
}

/* 4. Further tweaks for very small screens (like 400px in your screenshot) */
@media (max-width: 450px) {
  .temp-display {
    font-size: 3rem; /* Slightly smaller temp font for tiny screens */
  }
  
  .stats-grid {
    grid-template-columns: 1fr; /* Stack stats vertically if too cramped */
    gap: 0.75rem;
  }
  
  .sensor-cards-grid {
    grid-template-columns: 1fr; /* Stack sensor cards instead of side-by-side */
  }
  
  .log-header-row {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .log-action-btns {
    width: 100%;
    justify-content: space-between;
  }
}
/* ═══════════ THERMAL MAPPING MOBILE FIXES (FINAL) ═══════════ */

@media (max-width: 768px) {
  /* 1. Override the inline 1fr 1fr grid to stack vertically using flex */
  #thermalMappingPage > div[style*="grid-template-columns: 1fr 1fr"] {
    display: flex !important;
    flex-direction: column !important;
    gap: 1rem !important;
  }

  /* 2. Fix the Top Header & Action Buttons */
  #thermalMappingPage .header-controls {
    flex-direction: column;
    align-items: stretch;
  }

  #thermalMappingPage .action-buttons {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 0.5rem;
    margin-top: 1rem;
  }

  #thermalMappingPage .action-buttons button {
    width: 100%;
    justify-content: center;
  }

  /* 3. Force the grid container to fit the screen */
  #thermalGridContainer {
    width: 100% !important;
    max-width: 100% !important;
    overflow: hidden !important;
  }

  /* 4. Force cells to shrink and scale text perfectly */
  #thermalGridContainer > div {
    min-width: 0 !important; 
    min-height: 0 !important;
    font-size: clamp(0.25rem, 1.5vw, 0.5rem) !important; 
    padding: 0 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    overflow: hidden !important;
    white-space: nowrap !important;
    border-radius: 1px !important;
  }
  
  /* 5. Fix Map History Table from pushing the page width */
  #thermalMappingPage .log-card {
    width: 100%;
    min-width: 0;
    overflow: hidden;
  }
  
  #thermalMappingPage .log-header-row {
    flex-direction: column;
    align-items: flex-start;
  }
}