/* Import Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:ital,wght@0,400;0,500;0,600;0,700;0,900;1,600&family=Instrument+Serif:ital@1&display=swap');

/* CSS Variables / Design Tokens */
:root {
    /* Colors */
    --color-bg-primary: #04070d;
    --color-bg-secondary: rgb(20, 20, 20);
    --color-bg-card: rgba(8, 9, 10, 0.75);
    --color-text-primary: #fff;
    --color-text-secondary: #d5dbe6;
    --color-text-muted: rgba(213, 219, 230, 0.7);
    --color-border: rgba(216, 231, 242, 0.07);
    --color-border-highlight: rgba(184, 199, 217, 0.5);
    --color-accent: #a6daff;
    --color-accent-secondary: #6b9cff;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-pill: 100px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-md) 0;
    background: rgba(8, 9, 10, 0.75);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    background: rgba(20, 20, 20, 0.8);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-pill);
    border: 1px solid var(--color-border);
}

.nav-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.nav-links a:hover {
    color: var(--color-accent);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
}

/* Buttons */
.btn-primary,
.btn-secondary {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-pill);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 1px solid transparent;
}

.btn-primary {
    background: linear-gradient(180deg, rgb(20, 20, 20) 0%, rgba(255, 255, 255, 0.07) 100%);
    color: var(--color-text-primary);
    border-color: var(--color-border-highlight);
    backdrop-filter: blur(5px);
    box-shadow:
        inset 0px -0.48px 0.48px -1.25px rgba(0, 0, 0, 0.68),
        inset 0px -1.83px 1.83px -2.5px rgba(0, 0, 0, 0.6),
        inset 0px -8px 8px -3.75px rgba(0, 0, 0, 0.24);
}

.btn-primary:hover {
    transform: translateY(-2px);
    border-color: var(--color-accent);
    box-shadow: 0 8px 24px rgba(166, 218, 255, 0.2);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    background: rgba(20, 20, 20, 0.5);
    border-color: var(--color-border-highlight);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 100px;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.6;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.stat-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(12px);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    transition: all var(--transition-normal);
}

.stat-card:hover {
    border-color: var(--color-border-highlight);
    transform: translateY(-4px);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

/* Subscriptions Section */
.subscriptions-section {
    padding: var(--spacing-2xl) 0;
    min-height: 60vh;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
}

.subscriptions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.subscription-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(12px);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    transition: all var(--transition-normal);
    position: relative;
}

.subscription-card:hover {
    border-color: var(--color-border-highlight);
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(166, 218, 255, 0.1);
}

.subscription-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.subscription-info h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.subscription-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(166, 218, 255, 0.1);
    color: var(--color-accent);
    border-radius: var(--radius-pill);
    font-size: 0.75rem;
    font-weight: 600;
}

.subscription-cost {
    font-size: 2rem;
    font-weight: 900;
    color: var(--color-accent);
}

.subscription-billing {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

.subscription-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.next-payment {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.next-payment strong {
    color: var(--color-text-secondary);
    display: block;
    margin-top: 0.25rem;
}

.action-buttons {
    display: flex;
    gap: 0.5rem;
}

.edit-btn,
.delete-btn {
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.edit-btn {
    background: rgba(166, 218, 255, 0.1);
    color: var(--color-accent);
    border: 1px solid rgba(166, 218, 255, 0.3);
}

.edit-btn:hover {
    background: rgba(166, 218, 255, 0.2);
    border-color: var(--color-accent);
}

.delete-btn {
    background: rgba(255, 77, 77, 0.1);
    color: #ff4d4d;
    border: 1px solid rgba(255, 77, 77, 0.3);
}

.delete-btn:hover {
    background: rgba(255, 77, 77, 0.2);
    border-color: #ff4d4d;
}

/* Analytics Section */
.analytics-section {
    padding: var(--spacing-2xl) 0;
}

.analytics-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
}

.analytics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.analytics-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(12px);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.analytics-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.chart-placeholder {
    min-height: 250px;
    padding: var(--spacing-md);
    background: rgba(20, 20, 20, 0.5);
    border-radius: var(--radius-sm);
}

/* Bar Chart Styles */
.bar-chart {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    height: 200px;
    gap: 0.5rem;
    padding: 1rem 0.5rem 0;
}

.bar-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    height: 100%;
}

.bar {
    width: 100%;
    background: linear-gradient(180deg, var(--color-accent) 0%, var(--color-accent-secondary) 100%);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    position: relative;
    transition: all var(--transition-normal);
    min-height: 20px;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    animation: barGrow 0.8s ease forwards;
}

@keyframes barGrow {
    from {
        height: 0;
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.bar:hover {
    filter: brightness(1.2);
    transform: translateY(-2px);
}

.bar-value {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-text-primary);
    padding: 0.25rem;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.bar:hover .bar-value {
    opacity: 1;
}

.bar-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-weight: 600;
    text-transform: uppercase;
}

.category-list,
.upcoming-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.category-item,
.upcoming-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    background: rgba(20, 20, 20, 0.5);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

.category-name,
.payment-name {
    font-weight: 500;
    color: var(--color-text-secondary);
}

.category-amount,
.payment-amount {
    font-weight: 700;
    color: var(--color-accent);
}

.payment-date {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(4, 7, 13, 0.9);
    backdrop-filter: blur(8px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--color-bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--color-border-highlight);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
}

.modal-close {
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 2rem;
    cursor: pointer;
    line-height: 1;
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--color-text-primary);
}

#subscription-form {
    padding: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(20, 20, 20, 0.8);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-size: 1rem;
    font-family: 'Inter', sans-serif;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-accent);
}

.form-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.form-actions button {
    flex: 1;
}

/* Footer */
.footer {
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-2xl);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
}

.footer-brand p {
    color: var(--color-text-muted);
    margin-top: var(--spacing-sm);
}

.footer-links {
    display: flex;
    gap: var(--spacing-2xl);
}

.footer-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-column h4 {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.footer-column a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--color-accent);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 1199px) {
    .hero-title {
        font-size: 3rem;
    }

    .analytics-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 809px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .subscriptions-grid {
        grid-template-columns: 1fr;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-xl);
    }

    .hero-stats {
        grid-template-columns: 1fr;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.subscription-card,
.stat-card,
.analytics-card {
    animation: fadeIn 0.5s ease forwards;
}