/* Dark mode with purple vibes */
:root {
    --bg-primary: #0d0d1a;
    --bg-secondary: #1a1a2e;
    --bg-card: #16162a;
    --bg-card-hover: #1f1f3d;
    --bg-elevated: #252545;
    
    --text-primary: #f0f0f5;
    --text-secondary: #a0a0b5;
    --text-muted: #6a6a80;
    
    --purple-primary: #9b59b6;
    --purple-light: #bb8fce;
    --purple-dark: #7d3c98;
    --purple-glow: rgba(155, 89, 182, 0.3);
    
    --accent-green: #1abc9c;
    --accent-blue: #3498db;
    --accent-orange: #f39c12;
    --accent-red: #e74c3c;
    --accent-yellow: #f1c40f;
    
    --border-color: rgba(155, 89, 182, 0.2);
    --border-glow: rgba(155, 89, 182, 0.4);
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-purple: 0 4px 20px rgba(155, 89, 182, 0.15);
}

body {
    font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #1a0a2e 50%, var(--bg-primary) 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
}

/* Subtle animated background pattern */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(155, 89, 182, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(52, 152, 219, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(26, 188, 156, 0.04) 0%, transparent 40%);
    pointer-events: none;
    z-index: -1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: linear-gradient(145deg, var(--bg-secondary) 0%, var(--bg-card) 100%);
    padding: 25px 35px;
    border-radius: 20px;
    box-shadow: var(--shadow-md), var(--shadow-purple);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

header {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 15px;
}

.header-logo {
    height: 45px;
    width: auto;
    filter: brightness(1.1);
}

h1 {
    color: var(--text-primary);
    margin: 0;
    font-size: 1.8em;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--purple-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.refresh-btn {
    background: linear-gradient(145deg, var(--bg-elevated) 0%, var(--bg-card) 100%);
    color: var(--purple-light);
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2em;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.refresh-btn:hover {
    background: linear-gradient(145deg, var(--purple-dark) 0%, var(--purple-primary) 100%);
    color: white;
    border-color: var(--purple-primary);
    transform: rotate(180deg);
    box-shadow: 0 0 20px var(--purple-glow);
}

.chart-section {
    background: linear-gradient(145deg, var(--bg-card) 0%, var(--bg-secondary) 100%);
    margin-bottom: 25px;
    padding: 20px 25px 25px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.chart-section:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-md), 0 0 30px rgba(155, 89, 182, 0.1);
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.chart-header h3 {
    margin: 0;
    font-size: 1.1em;
    font-weight: 600;
    color: var(--text-primary);
    position: relative;
    padding-left: 15px;
}

.chart-header h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 70%;
    background: linear-gradient(180deg, var(--purple-primary) 0%, var(--purple-dark) 100%);
    border-radius: 2px;
}

.download-btn {
    background: linear-gradient(145deg, var(--bg-elevated) 0%, var(--bg-card) 100%);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px 12px;
    cursor: pointer;
    font-size: 0.9em;
    transition: all 0.3s ease;
}

.download-btn:hover {
    background: linear-gradient(145deg, var(--purple-dark) 0%, var(--purple-primary) 100%);
    color: white;
    border-color: var(--purple-primary);
    box-shadow: 0 0 15px var(--purple-glow);
}

.download-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.chart-container {
    position: relative;
    height: 450px;
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    padding: 10px;
    box-sizing: border-box;
}

.power-stat {
    text-align: center;
    padding: 25px 15px 15px;
    border-top: 1px solid var(--border-color);
    margin-top: 20px;
}

.power-number {
    display: block;
    font-size: 3em;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-green) 0%, var(--purple-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
}

.power-label {
    display: block;
    font-size: 0.95em;
    color: var(--text-secondary);
    margin-top: 8px;
}

.power-stat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    padding: 25px 15px 15px;
    border-top: 1px solid var(--border-color);
    margin-top: 20px;
}

.power-stat-grid.two-col {
    grid-template-columns: repeat(2, 1fr);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.power-stat-grid.three-col {
    grid-template-columns: repeat(3, 1fr);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.power-stat-grid.four-col {
    grid-template-columns: repeat(4, 1fr);
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

.power-stat-grid.two-rows {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.power-stat-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.power-stat-row.three-col {
    grid-template-columns: repeat(3, 1fr);
}

.power-stat-grid.three-col-rows {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.power-stat-grid.six-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.chart-description {
    font-size: 0.9em;
    color: var(--text-secondary);
    margin: 0 0 12px 0;
    padding: 0;
}

.chart-note {
    font-size: 0.85em;
    color: var(--text-muted);
    font-style: italic;
    margin: 15px 0;
    padding: 15px 18px;
    background: linear-gradient(135deg, rgba(155, 89, 182, 0.1) 0%, rgba(52, 152, 219, 0.05) 100%);
    border-left: 3px solid var(--purple-primary);
    border-radius: 0 8px 8px 0;
    line-height: 1.6;
}

.power-stat-item {
    text-align: center;
    padding: 18px 15px;
    background: linear-gradient(145deg, var(--bg-elevated) 0%, var(--bg-card) 100%);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.power-stat-item:hover {
    border-color: var(--border-glow);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(155, 89, 182, 0.15);
}

.power-stat-item .power-number {
    font-size: 2em;
    margin-bottom: 0;
}

.power-stat-item .power-percent {
    display: block;
    font-size: 0.95em;
    color: var(--accent-green);
    font-weight: 600;
    margin-bottom: 5px;
}

.power-stat-item .power-label {
    font-size: 0.8em;
    color: var(--text-muted);
}

/* Enhanced content power stats */
.content-stat-card {
    text-align: center;
    padding: 28px 22px;
    background: linear-gradient(145deg, var(--bg-elevated) 0%, var(--bg-card) 100%);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.content-stat-card:hover {
    transform: translateY(-3px);
    border-color: var(--border-glow);
    box-shadow: var(--shadow-md), 0 0 30px rgba(155, 89, 182, 0.1);
}

.content-stat-card .stat-value {
    display: block;
    font-size: 2.6em;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 8px;
}

.content-stat-card .stat-change {
    display: inline-block;
    font-size: 0.95em;
    font-weight: 600;
    padding: 5px 12px;
    border-radius: 20px;
    margin-bottom: 12px;
}

.content-stat-card .stat-change.negative {
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.2) 0%, rgba(231, 76, 60, 0.1) 100%);
    color: #ff6b6b;
}

.content-stat-card .stat-change.positive {
    background: linear-gradient(135deg, rgba(26, 188, 156, 0.2) 0%, rgba(26, 188, 156, 0.1) 100%);
    color: #2ecc71;
}

.content-stat-card .stat-label {
    display: block;
    font-size: 0.95em;
    color: var(--text-muted);
    font-weight: 500;
}

.content-stat-card.version .stat-value {
    background: linear-gradient(135deg, #1abc9c 0%, #16a085 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.content-stat-card.uploaded .stat-value {
    background: linear-gradient(135deg, var(--purple-light) 0%, var(--purple-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.content-stat-card.stitched .stat-value {
    background: linear-gradient(135deg, #f1c40f 0%, #f39c12 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Tesco stat cards */
.tesco-stat-card {
    text-align: center;
    padding: 20px 15px;
    background: linear-gradient(145deg, var(--bg-elevated) 0%, var(--bg-card) 100%);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.tesco-stat-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-glow);
    box-shadow: 0 8px 25px rgba(155, 89, 182, 0.15);
}

.tesco-stat-card .stat-value {
    display: block;
    font-size: 2.2em;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 8px;
}

.tesco-stat-card .stat-label {
    display: block;
    font-size: 0.85em;
    color: var(--text-muted);
    font-weight: 500;
}

.tesco-stat-card.tickets .stat-value {
    background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tesco-stat-card.units .stat-value {
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tesco-stat-card.wifi .stat-value {
    background: linear-gradient(135deg, #27ae60 0%, #1e8449 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tesco-stat-card.tickets-saved .stat-value {
    background: linear-gradient(135deg, var(--purple-light) 0%, var(--purple-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tesco-stat-card.time-saved .stat-value {
    background: linear-gradient(135deg, #1abc9c 0%, #16a085 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tesco-stat-card.visits .stat-value {
    background: linear-gradient(135deg, #e67e22 0%, #d35400 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tesco-stat-card.calls .stat-value {
    background: linear-gradient(135deg, #f39c12 0%, #e67e22 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tesco-stat-card.pre-wifi .stat-value {
    background: linear-gradient(135deg, #f5b041 0%, #e67e22 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tesco-stat-card.post-wifi .stat-value {
    background: linear-gradient(135deg, #58d68d 0%, #27ae60 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tesco-stat-card .stat-change {
    display: inline-block;
    font-size: 0.85em;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 20px;
    margin-bottom: 8px;
}

.tesco-stat-card .stat-change.positive {
    background: linear-gradient(135deg, rgba(88, 214, 141, 0.2) 0%, rgba(88, 214, 141, 0.1) 100%);
    color: #58d68d;
}

.content-stat-card.tickets .stat-value {
    background: linear-gradient(135deg, #ec7063 0%, #e74c3c 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.content-stat-card.units .stat-value {
    background: linear-gradient(135deg, #5dade2 0%, #3498db 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.content-stat-card.wifi .stat-value {
    background: linear-gradient(135deg, #58d68d 0%, #27ae60 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--purple-primary) 0%, var(--purple-dark) 100%);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--purple-light) 0%, var(--purple-primary) 100%);
}

/* Selection styling */
::selection {
    background: var(--purple-glow);
    color: var(--text-primary);
}

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

/* Tablet breakpoint */
@media (max-width: 992px) {
    .container {
        padding: 20px 25px;
    }
    
    .power-stat-grid.four-col {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .power-stat-grid.six-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .content-stat-card .stat-value,
    .tesco-stat-card .stat-value {
        font-size: 2.2em;
    }
}

/* Small tablet / large mobile */
@media (max-width: 768px) {
    body {
        padding: 12px;
        overflow-x: hidden;
    }
    
    .container {
        padding: 15px 18px;
        border-radius: 14px;
        overflow-x: hidden;
    }
    
    h1 {
        font-size: 1.4em;
    }
    
    .header-logo {
        height: 35px;
    }
    
    .header-brand {
        gap: 10px;
    }
    
    .chart-section {
        padding: 15px 15px 20px;
        margin-bottom: 18px;
        border-radius: 12px;
        overflow-x: hidden;
    }
    
    .chart-header h3 {
        font-size: 0.95em;
        padding-left: 12px;
    }
    
    .chart-container {
        height: 350px;
        padding: 8px;
    }
    
    .power-stat-grid {
        display: grid !important;
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px !important;
        padding: 18px 10px 12px;
    }
    
    .power-stat-grid.two-col,
    .power-stat-grid.three-col {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    
    .power-stat-grid.four-col,
    .power-stat-grid.six-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    
    .power-stat-row {
        display: grid !important;
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px !important;
    }
    
    .power-stat-row.three-col {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    
    .content-stat-card,
    .tesco-stat-card,
    .power-stat-item {
        width: 100% !important;
        box-sizing: border-box !important;
    }
    
    .content-stat-card {
        padding: 20px 15px;
    }
    
    .content-stat-card .stat-value {
        font-size: 1.9em;
    }
    
    .content-stat-card .stat-label {
        font-size: 0.85em;
    }
    
    .content-stat-card .stat-change {
        font-size: 0.85em;
        padding: 4px 10px;
    }
    
    .tesco-stat-card {
        padding: 15px 12px;
    }
    
    .tesco-stat-card .stat-value {
        font-size: 1.8em;
    }
    
    .tesco-stat-card .stat-label {
        font-size: 0.8em;
    }
    
    .power-stat-item .power-number {
        font-size: 1.6em;
    }
    
    .power-number {
        font-size: 2.4em;
    }
    
    .chart-note {
        font-size: 0.8em;
        padding: 12px 14px;
    }
    
    .chart-description {
        font-size: 0.85em;
        margin: 0 0 10px 0;
    }
}

/* Mobile breakpoint */
@media (max-width: 576px) {
    body {
        padding: 8px;
        overflow-x: hidden;
    }
    
    .container {
        padding: 12px 12px;
        border-radius: 10px;
        overflow-x: hidden;
    }
    
    h1 {
        font-size: 1.2em;
    }
    
    .header-logo {
        height: 28px;
    }
    
    .refresh-btn {
        width: 34px;
        height: 34px;
        font-size: 1em;
    }
    
    .chart-section {
        padding: 12px 12px 15px;
        margin-bottom: 14px;
        border-radius: 10px;
        overflow-x: hidden;
    }
    
    .chart-header h3 {
        font-size: 0.85em;
        padding-left: 10px;
    }
    
    .chart-header h3::before {
        width: 3px;
    }
    
    .download-btn {
        padding: 6px 10px;
        font-size: 0.8em;
    }
    
    .chart-container {
        height: 280px;
        padding: 6px;
        border-radius: 8px;
    }
    
    .power-stat-grid {
        display: grid !important;
        grid-template-columns: 1fr !important;
        gap: 10px !important;
        padding: 15px 8px 10px;
    }
    
    .power-stat-grid.two-col,
    .power-stat-grid.three-col,
    .power-stat-grid.four-col,
    .power-stat-grid.six-grid {
        display: grid !important;
        grid-template-columns: 1fr !important;
    }
    
    .power-stat-row {
        display: grid !important;
        grid-template-columns: 1fr !important;
        gap: 10px !important;
    }
    
    .power-stat-row.three-col {
        grid-template-columns: 1fr !important;
    }
    
    .power-stat-grid.two-rows {
        gap: 10px;
    }
    
    .content-stat-card,
    .tesco-stat-card,
    .power-stat-item {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
    }
    
    .content-stat-card {
        padding: 18px 14px;
        border-radius: 12px;
    }
    
    .content-stat-card .stat-value {
        font-size: 1.7em;
        word-break: break-word;
    }
    
    .content-stat-card .stat-label {
        font-size: 0.8em;
    }
    
    .content-stat-card .stat-change {
        font-size: 0.8em;
        padding: 3px 8px;
        margin-bottom: 8px;
    }
    
    .tesco-stat-card {
        padding: 14px 12px;
        border-radius: 10px;
    }
    
    .tesco-stat-card .stat-value {
        font-size: 1.5em;
        word-break: break-word;
    }
    
    .tesco-stat-card .stat-label {
        font-size: 0.75em;
    }
    
    .tesco-stat-card .stat-change {
        font-size: 0.75em;
        padding: 3px 8px;
    }
    
    .power-stat-item {
        padding: 14px 12px;
    }
    
    .power-stat-item .power-number {
        font-size: 1.4em;
    }
    
    .power-stat-item .power-label {
        font-size: 0.75em;
    }
    
    .power-number {
        font-size: 2em;
    }
    
    .power-label {
        font-size: 0.85em;
    }
    
    .chart-note {
        font-size: 0.75em;
        padding: 10px 12px;
        margin: 12px 0;
    }
    
    .chart-description {
        font-size: 0.8em;
        margin: 0 0 8px 0;
    }
}

/* Extra small mobile */
@media (max-width: 380px) {
    .container {
        padding: 10px 8px;
    }
    
    h1 {
        font-size: 1.1em;
    }
    
    .header-logo {
        height: 24px;
    }
    
    .chart-container {
        height: 240px;
    }
    
    .content-stat-card .stat-value {
        font-size: 1.5em;
    }
    
    .tesco-stat-card .stat-value {
        font-size: 1.3em;
    }
    
    .power-number {
        font-size: 1.8em;
    }
}