@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg-white: #ffffff;
    --bg-subtle: #f8f9fa;
    --card-bg: #ffffff;
    --card-border: #e4e4e7;
    --card-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.05), 0 4px 12px -2px rgba(0, 0, 0, 0.03);
    
    --text-primary: #09090b;
    --text-secondary: #71717a;
    --text-muted: #a1a1aa;
    
    --accent-black: #09090b;
    --accent-black-hover: #27272a;
    
    --badge-green-bg: #f0fdf4;
    --badge-green-border: #bbf7d0;
    --badge-green-text: #15803d;
    
    --badge-red-bg: #fef2f2;
    --badge-red-border: #fecaca;
    --badge-red-text: #b91c1c;

    --radius-lg: 16px;
    --radius-md: 10px;
    --radius-sm: 6px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-white);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
}

/* Container */
.container {
    max-width: 960px;
    margin: 40px auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 960px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 20px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--accent-black);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.brand i {
    font-size: 1.2rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 24px;
    list-style: none;
}

/* Clean Navbar Links & Focus/Active Fix */
.nav-menu a, 
.nav-menu a:focus, 
.nav-menu a:active, 
.nav-menu a:visited {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    background: transparent !important;
    background-color: transparent !important;
    box-shadow: none !important;
    outline: none !important;
    border: none !important;
    transition: color 0.2s ease;
    -webkit-tap-highlight-color: transparent;
}

.nav-menu a:hover {
    color: var(--text-primary);
}

.nav-menu a.active {
    color: var(--text-primary) !important;
    font-weight: 700 !important;
}

/* Cards */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--card-shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card-header h2, .card-header h3 {
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 4px;
}

/* Cylinder Meter */
.cylinder-box {
    background: var(--bg-subtle);
    padding: 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--card-border);
}

.cylinder-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.progress-bar-bg {
    width: 100%;
    height: 10px;
    background: #e4e4e7;
    border-radius: 5px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--accent-black);
    transition: width 0.5s ease;
}

/* Timer Display */
.timer-display {
    font-size: 5rem;
    font-weight: 800;
    font-family: 'Plus Jakarta Sans', monospace;
    color: var(--accent-black);
    letter-spacing: -2px;
    margin: 20px 0;
}

/* Form Controls */
.input-glass {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-subtle);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
    transition: all 0.2s ease;
}

.input-glass::placeholder {
    color: var(--text-muted);
}

.input-glass:focus {
    background: #ffffff;
    border-color: var(--accent-black);
    box-shadow: 0 0 0 3px rgba(9, 9, 11, 0.05);
}

.meal-input-box {
    max-width: 420px;
    margin: 0 auto 24px auto;
}

.console-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    margin-top: 8px;
    margin-bottom: 16px;
}

/* Buttons */
.btn-ice {
    background: var(--accent-black);
    color: #ffffff;
    border: 1px solid var(--accent-black);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

.btn-ice:hover {
    background: var(--accent-black-hover);
    border-color: var(--accent-black-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.btn-danger-ice {
    background: #ffffff;
    color: var(--badge-red-text);
    border: 1px solid var(--badge-red-border);
    box-shadow: none;
}

.btn-danger-ice:hover {
    background: var(--badge-red-bg);
    border-color: var(--badge-red-text);
    transform: translateY(-1px);
}

.btn-block {
    width: 100%;
}

/* Burner Selector */
.burner-selector {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin: 20px 0;
}

.radio-card input {
    display: none;
}

.radio-content {
    padding: 12px 24px;
    background: var(--bg-subtle);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.radio-card input:checked + .radio-content {
    background: var(--accent-black);
    color: #ffffff;
    border-color: var(--accent-black);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

/* Burner Status Badges */
.burner-status-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 16px;
}

.burner-badge {
    padding: 14px 20px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    text-align: center;
    border: 1px solid var(--card-border);
}

.badge-free {
    background: var(--badge-green-bg);
    color: var(--badge-green-text);
    border-color: var(--badge-green-border);
}

.badge-busy {
    background: var(--badge-red-bg);
    color: var(--badge-red-text);
    border-color: var(--badge-red-border);
}

/* Tables & Summary */
.table-responsive {
    overflow-x: auto;
    margin-top: 16px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--card-border);
    font-size: 0.875rem;
}

th {
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    background: var(--bg-subtle);
}

td {
    color: var(--text-primary);
}

.day-table-card {
    background: #ffffff;
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 20px;
}

.grand-total-box {
    background: var(--bg-subtle);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
    margin-top: 24px;
}

.grand-total-box h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.grand-total-box p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 6px;
}

/* Auth Pages */
.auth-body {
    background-color: var(--bg-subtle);
    display: flex;
    justify-content: center;
    align-items: center;
}

.auth-card {
    width: 100%;
    max-width: 420px;
    margin: 60px 16px;
    background: #ffffff;
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 36px 30px;
    box-shadow: var(--card-shadow);
}

.brand-logo {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent-black);
    letter-spacing: -0.5px;
}

.auth-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: var(--bg-subtle);
    padding: 4px;
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    border: 1px solid var(--card-border);
}

.tab-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 10px;
    font-weight: 600;
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.tab-btn.active {
    background: #ffffff;
    color: var(--accent-black);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

/* Utility Classes */
.mb-4 { margin-bottom: 24px; }
.mt-3 { margin-top: 16px; }
.text-center { text-align: center; }
.hidden { display: none !important; }

/* Responsive Adjustments */
@media (max-width: 768px) {
    .burner-status-grid {
        grid-template-columns: 1fr;
    }
    .timer-display {
        font-size: 3.8rem;
    }
}

/* Mobile & Tablet Navbar Fix */
@media (max-width: 768px) {
    .nav-container {
        flex-wrap: wrap;
        gap: 12px;
        padding: 12px 16px;
    }

    .nav-menu {
        gap: 12px;
        font-size: 0.85rem;
    }

    .nav-menu a {
        padding: 4px 8px;
        white-space: nowrap;
    }
}

@media (max-width: 480px) {
    .brand span {
        display: none; /* ছোট স্ক্রিনে ব্র্যান্ড নেম বড় হলে শুধু লোগো দেখাবে */
    }
    
    .nav-container {
        justify-content: space-between;
    }
}

/* Profile Nav Button */
.profile-btn {
    display: inline-flex !important;
    align-items: center;
    gap: 8px;
    background: var(--bg-subtle) !important;
    padding: 6px 14px !important;
    border-radius: 20px !important;
    border: 1px solid var(--card-border) !important;
    font-weight: 600 !important;
}

.profile-btn:hover {
    background: #e4e4e7 !important;
}

/* User Profile Page Layout */
.profile-card {
    text-align: center;
    padding: 32px 24px;
}

.profile-avatar {
    width: 72px;
    height: 72px;
    background: var(--accent-black);
    color: #ffffff;
    font-size: 1.8rem;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px auto;
}

/* User Stats Grid (Usage & Cost) */
.user-stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 24px;
}

.stat-card {
    background: var(--bg-subtle);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: 20px;
    text-align: center;
}

.stat-card h4 {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-card p {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--accent-black);
    margin-top: 6px;
}

/* Responsive Grid for Mobile */
@media (max-width: 600px) {
    .user-stats-grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================
   Mobile & Tablet Fully Responsive Fix
   ========================================== */

@media (max-width: 768px) {
    /* Container & Spacing */
    .container {
        margin: 15px auto !important;
        padding: 0 12px !important;
        width: 100% !important;
        overflow-x: hidden;
    }

    /* Navbar Responsiveness */
    .nav-container {
        flex-direction: column !important;
        align-items: center !important;
        padding: 12px 10px !important;
        gap: 12px !important;
    }

    .brand {
        font-size: 1.1rem !important;
    }

    .nav-menu {
        flex-wrap: wrap !important;
        justify-content: center !important;
        gap: 8px !important;
        width: 100% !important;
    }

    .nav-menu li {
        margin: 2px 0;
    }

    .nav-menu a {
        font-size: 0.8rem !important;
        padding: 6px 10px !important;
        white-space: nowrap !important;
    }

    .profile-btn {
        padding: 4px 10px !important;
        font-size: 0.8rem !important;
    }

    /* Cards & Layout Fixes */
    .card {
        padding: 16px !important;
        border-radius: 12px !important;
    }

    .timer-display {
        font-size: 3rem !important;
    }

    /* Table Horizontal Scroll Fix */
    .table-responsive {
        width: 100% !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch;
        display: block;
    }

    table {
        min-width: 480px; /* টেবিল ভাঙা আটকাবে, স্মুথ স্ক্রোল হবে */
    }

    th, td {
        padding: 8px 10px !important;
        font-size: 0.8rem !important;
    }

    /* Grid Layouts Stack on Mobile */
    .burner-status-grid, 
    .user-stats-grid {
        grid-template-columns: 1fr !important;
        gap: 12px !important;
    }

    .burner-selector {
        flex-wrap: wrap;
        gap: 8px;
    }

    .radio-content {
        padding: 8px 14px !important;
        font-size: 0.85rem !important;
    }
}