/* =========================================
   THEME VARIABLES
   ========================================= */

/* Light theme (default) */
:root {
    --primary-color: #1B4C59;
    --secondary-color: #2a659e;
    --background-color: #f5f7fa;
    --surface-color: #ffffff;
    --text-color: #333333;
    --text-secondary: #666666;
    --border-color: #e1e5e9;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --error-color: #f44336;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* Dark theme */
[data-theme="dark"] {
    --primary-color: #4a9ebd;
    --secondary-color: #6ba8d6;
    --background-color: #1a1a2e;
    --surface-color: #16213e;
    --text-color: #e6e6e6;
    --text-secondary: #b0b0b0;
    --border-color: #2d4059;
    --success-color: #66bb6a;
    --warning-color: #ffb74d;
    --error-color: #ef5350;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

/* High contrast theme */
[data-theme="highContrast"] {
    --primary-color: #000000;
    --secondary-color: #333333;
    --background-color: #ffffff;
    --surface-color: #f0f0f0;
    --text-color: #000000;
    --text-secondary: #333333;
    --border-color: #000000;
    --success-color: #006600;
    --warning-color: #996600;
    --error-color: #cc0000;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

/* Optional smooth theme transitions */
body.theme-transition * {
    transition: background-color 0.3s ease,
        color 0.3s ease,
        border-color 0.3s ease,
        box-shadow 0.3s ease !important;
}

/* =========================================
   GLOBAL RESET AND BASE
   ========================================= */

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: var(--background-color);
    color: var(--text-color);
    min-height: 100vh;
    padding: 20px;
    transition: background-color 0.3s, color 0.3s;
}

#app-container {
    max-width: 1400px;
    margin: 0 auto;
}

/* =========================================
   HEADER
   ========================================= */

.app-header {
    background: var(--primary-color);
    color: white;
    padding: 15px 25px;
    border-radius: 15px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 15px;
}

.app-logo {
    width: 50px;
    height: 50px;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    overflow: hidden;
    padding: 2px;
}

.app-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.app-logo-placeholder {
    width: 50px;
    height: 50px;
    background: white;
    color: #1B4C59;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 24px;
    border-radius: 10px;
}

.app-title {
    font-size: 24px;
    margin-bottom: 5px;
}

.app-subtitle {
    font-size: 14px;
    opacity: 0.9;
}

.header-controls {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* Fix for buttons inside the dark header */
.app-header .btn-outline {
    border-color: rgba(255, 255, 255, 0.7);
    color: white;
}

.app-header .btn-outline:hover {
    background: white;
    color: var(--primary-color);
}

/* =========================================
   BUTTONS
   ========================================= */

.btn {
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s;
    font-size: 14px;
    background: transparent;
    color: var(--text-color);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    justify-content: center;
    border-radius: 50%;
}

.btn-large {
    padding: 15px 30px;
    font-size: 16px;
}

/* =========================================
   THEME TOGGLE VISIBILITY & AUTO ICON COLOR
   ========================================= */

/* Кнопка переключения темы в шапке */
.app-header #themeToggle {
    background-color: rgba(255, 255, 255, 0.25);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(4px);
}

/* Иконка: базовый белый цвет + фильтр в тёмной теме */
.app-header #themeToggle i {
    color: #ffffff;
    transition: filter 0.2s ease;
}

/* В тёмной теме инвертируем иконку (делаем её тёмной на белой кнопке) */
[data-theme="dark"] .app-header #themeToggle i {
    filter: invert(1);
}

/* В highContrast усиливаем контраст */
[data-theme="highContrast"] .app-header #themeToggle i {
    filter: invert(1) contrast(200%);
}

/* Кнопка в тёмной теме — белая, чтобы не теряться на тёмном фоне */
[data-theme="dark"] .app-header #themeToggle {
    background-color: #ffffff;
    border-color: #ffffff;
}

/* Hover */
.app-header #themeToggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* =========================================
   PROJECT CONTROLS
   ========================================= */

.project-controls {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 30px;
    padding: 20px;
    background: var(--surface-color);
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
}

.project-info,
.export-controls {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
}

.project-input {
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--surface-color);
    color: var(--text-color);
}

/* =========================================
   LAYOUT GRID
   ========================================= */

.main-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    align-items: start;
}

@media (max-width: 1100px) {
    .main-grid {
        grid-template-columns: 1fr;
    }
}

/* =========================================
   CARDS
   ========================================= */

.card {
    background: var(--surface-color);
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    margin-bottom: 30px;
    color: var(--text-color);
}

.card-title {
    color: var(--primary-color);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
    font-size: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* =========================================
   FORMS
   ========================================= */

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 768px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
}

.form-group {
    margin-bottom: 16px;
}

label {
    display: block;
    margin-bottom: 6px;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 14px;
}

input,
select,
textarea {
    width: 100%;
    padding: 10px 13px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s;
    background: var(--surface-color);
    color: var(--text-color);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-color) 20%, transparent);
}

.inline-checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
}

.inline-checkbox input {
    width: auto;
}

.validation-error {
    color: var(--error-color);
    font-size: 12px;
    margin-top: 5px;
    min-height: 18px;
}

/* =========================================
   RESULTS
   ========================================= */

.no-results {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
}

.no-results i {
    font-size: 48px;
    margin-bottom: 20px;
    color: var(--border-color);
}

.results-grid {
    display: grid;
    gap: 10px;
}

.result-item {
    display: flex;
    justify-content: space-between;
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
}

.result-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.result-value {
    color: var(--primary-color);
    font-weight: 600;
}

/* =========================================
   WARNING / SUCCESS BOXES
   ========================================= */

.warning-box {
    background: color-mix(in srgb, var(--warning-color) 20%, transparent);
    border-left: 4px solid var(--warning-color);
    padding: 12px;
    border-radius: 8px;
    margin-top: 15px;
    color: var(--text-color);
}

.success-box {
    background: color-mix(in srgb, var(--success-color) 20%, transparent);
    border-left: 4px solid var(--success-color);
    padding: 12px;
    border-radius: 8px;
    margin-top: 15px;
    color: var(--text-color);
}

/* Индикаторы по цвету */

.success {
    background-color: color-mix(in srgb, var(--success-color) 20%, transparent);
    border-left: 4px solid var(--success-color);
    color: var(--text-color);
}

.warning {
    background-color: color-mix(in srgb, var(--warning-color) 20%, transparent);
    border-left: 4px solid var(--warning-color);
    color: var(--text-color);
}

.error {
    background-color: color-mix(in srgb, var(--error-color) 20%, transparent);
    border-left: 4px solid var(--error-color);
    color: var(--text-color);
}

/* =========================================
   STICKY RUN BUTTON
   ========================================= */

.sticky-run {
    position: sticky;
    bottom: 0;
    z-index: 20;
    background: rgba(255, 255, 255, 0.95);
    padding: 12px 0 4px 0;
    text-align: center;
    margin-top: 30px;
}

@media (max-width: 768px) {
    .sticky-run {
        position: static;
        background: transparent;
    }
}

/* =========================================
   FOOTER
   ========================================= */

.app-footer {
    text-align: center;
    margin-top: 30px;
    color: var(--text-secondary);
    font-size: 12px;
    line-height: 1.4;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

/* =========================================
   MODALS
   ========================================= */

.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal {
    background: var(--surface-color);
    padding: 30px;
    border-radius: 15px;
    max-width: 500px;
    width: 90%;
    color: var(--text-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-color);
}

/* =========================================
   THEME MENU / HISTORY
   ========================================= */

.history-item {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 10px 12px;
    border-radius: 6px;
    margin-bottom: 6px;
    cursor: pointer;
}

.history-item:hover {
    background-color: color-mix(in srgb, var(--primary-color) 10%, transparent);
}

.theme-menu {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    border-radius: 8px;
    padding: 8px;
}

.theme-option {
    color: var(--text-color);
    padding: 10px;
    border-radius: 4px;
    cursor: pointer;
}

.theme-option:hover {
    background-color: color-mix(in srgb, var(--primary-color) 10%, transparent);
}

.theme-option.active {
    background-color: var(--primary-color);
    color: white;
}

/* =========================================
   TABLES
   ========================================= */

table {
    width: 100%;
    border-collapse: collapse;
    border-color: var(--border-color);
}

th,
td {
    padding: 8px 10px;
    border: 1px solid var(--border-color);
    text-align: left;
}

th {
    background-color: color-mix(in srgb, var(--primary-color) 10%, transparent);
    color: var(--text-color);
}

/* =========================================
   ASHRAE guideline colouring
   ========================================= */

.ashrae-guideline-row {
    margin-top: 4px;
}

.ashrae-guideline-value {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
}

.ashrae-icon {
    font-size: 16px;
}

/* Красный – amplification / not acceptable */
.ashrae-bad {
    color: var(--error-color);
}

/* Animation for updated values */
@keyframes highlightUpdate {
    0% {
        background-color: rgba(27, 76, 89, 0.2);
    }

    100% {
        background-color: transparent;
    }
}

.highlight-update {
    animation: highlightUpdate 1s ease-out;
}

/* Жёлтый – borderline */
.ashrae-borderline {
    color: var(--warning-color);
}

/* Зелёный – good / excellent */
.ashrae-good,
.ashrae-excellent {
    color: var(--success-color);
}

/* =========================================
   SCHEMATIC ILLUSTRATION
   ========================================= */

.schematic-container {
    background: #ffffff;
    padding: 15px;
    border-radius: 12px;
    margin-bottom: 25px;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
}

.schematic-container img {
    max-width: 50%;
    height: auto;
    display: block;
    margin: 0 auto;
}

[data-theme="dark"] .schematic-container {
    background: #f0f4f8;
    /* Keep schematic background light for readability of labels */
    border-color: var(--border-color);
}

/* =========================================
   MOBILE RESPONSIVE STYLES
   ========================================= */

/* Tablet and smaller */
@media (max-width: 768px) {
    body {
        padding: 10px;
        font-size: 16px;
    }

    /* Header adjustments */
    .app-header {
        padding: 12px 15px;
        border-radius: 10px;
        margin-bottom: 20px;
    }

    .header-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .logo-section {
        width: 100%;
    }

    .app-title {
        font-size: 20px;
    }

    .app-subtitle {
        font-size: 12px;
    }

    .header-controls {
        width: 100%;
        justify-content: flex-start;
    }

    .header-controls .btn {
        padding: 8px 12px;
        font-size: 12px;
    }

    /* Project controls - stack vertically */
    .project-controls {
        flex-direction: column;
        padding: 15px;
        gap: 15px;
    }

    .project-info,
    .export-controls {
        width: 100%;
        justify-content: flex-start;
    }

    .project-input {
        flex: 1;
        min-width: 0;
    }

    /* Cards */
    .card {
        padding: 15px;
        margin-bottom: 20px;
        border-radius: 10px;
    }

    .card-title {
        font-size: 16px;
        margin-bottom: 15px;
    }

    /* Schematic image - full width on mobile */
    .schematic-container img {
        max-width: 100%;
    }

    /* Buttons */
    .btn {
        padding: 8px 14px;
        font-size: 13px;
    }

    .btn-large {
        padding: 12px 20px;
        font-size: 14px;
        width: 100%;
    }

    /* Sticky button */
    .sticky-run {
        padding: 10px;
        margin-top: 20px;
    }

    /* Form inputs */
    input,
    select,
    textarea {
        padding: 12px;
        font-size: 16px; /* Prevents iOS zoom on focus */
    }

    label {
        font-size: 13px;
    }

    /* Results */
    .result-item {
        flex-direction: column;
        gap: 5px;
        padding: 10px;
    }

    .result-value {
        font-size: 16px;
    }

    /* Modal adjustments */
    .modal {
        padding: 20px;
        width: 95%;
        max-height: 90vh;
        overflow-y: auto;
    }

    /* Footer */
    .app-footer {
        padding: 15px 10px;
        font-size: 11px;
    }
}

/* Small phones */
@media (max-width: 480px) {
    body {
        padding: 8px;
    }

    .app-header {
        padding: 10px 12px;
    }

    .app-title {
        font-size: 18px;
    }

    .header-controls {
        gap: 5px;
    }

    .header-controls .btn {
        padding: 6px 10px;
        font-size: 11px;
    }

    /* Hide button text, show only icons on very small screens */
    .header-controls .btn-outline {
        padding: 8px;
    }

    .project-controls {
        padding: 12px;
    }

    .project-info .btn,
    .export-controls .btn {
        padding: 8px 10px;
        font-size: 11px;
    }

    /* Stack project inputs vertically */
    .project-info {
        flex-direction: column;
    }

    .project-info .project-input {
        width: 100%;
    }

    /* Card adjustments */
    .card {
        padding: 12px;
    }

    .card-title {
        font-size: 15px;
    }

    /* Form grid - always single column */
    .form-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .form-group {
        margin-bottom: 12px;
    }

    /* Table responsiveness */
    table {
        font-size: 12px;
    }

    th,
    td {
        padding: 6px 8px;
    }

    /* No results icon smaller */
    .no-results i {
        font-size: 36px;
    }
}

/* Landscape mode on phones */
@media (max-height: 500px) and (orientation: landscape) {
    .sticky-run {
        position: static;
        background: transparent;
    }

    .modal {
        max-height: 95vh;
    }
}