/* ===== CSS Variables & Design Tokens ===== */
:root {
    /* Colors - Midnight Glass Theme */
    --color-bg-dark: #0a0a1a;
    --color-bg-gradient-start: #0f0c29;
    --color-bg-gradient-mid: #302b63;
    --color-bg-gradient-end: #24243e;

    --color-glass: rgba(255, 255, 255, 0.05);
    --color-glass-border: rgba(255, 255, 255, 0.1);
    --color-glass-hover: rgba(255, 255, 255, 0.08);

    --color-primary: #a855f7;
    --color-primary-light: #c084fc;
    --color-primary-dark: #7c3aed;

    --color-accent: #22d3ee;
    --color-accent-pink: #f472b6;

    --color-text-primary: #ffffff;
    --color-text-secondary: rgba(255, 255, 255, 0.7);
    --color-text-muted: rgba(255, 255, 255, 0.5);

    /* Platform Colors */
    --color-instagram: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
    --color-tiktok: #00f2ea;
    --color-linkedin: #0077b5;
    --color-twitter: #ffffff;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-glow: 0 0 40px rgba(168, 85, 247, 0.3);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg-dark);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== App Container ===== */
.app-container {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Animated Background ===== */
.bg-gradient {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg,
            var(--color-bg-gradient-start) 0%,
            var(--color-bg-gradient-mid) 50%,
            var(--color-bg-gradient-end) 100%);
    z-index: -2;
}

.bg-orbs {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: var(--color-primary);
    top: -100px;
    right: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 300px;
    height: 300px;
    background: var(--color-accent);
    bottom: 20%;
    left: -100px;
    animation-delay: -5s;
}

.orb-3 {
    width: 250px;
    height: 250px;
    background: var(--color-accent-pink);
    bottom: -50px;
    right: 10%;
    animation-delay: -10s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    25% {
        transform: translate(30px, -30px) scale(1.05);
    }

    50% {
        transform: translate(-20px, 20px) scale(0.95);
    }

    75% {
        transform: translate(-30px, -20px) scale(1.02);
    }
}

/* ===== Glass Card ===== */
.glass-card {
    background: var(--color-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    transition: all var(--transition-base);
}

.glass-card:hover {
    background: var(--color-glass-hover);
    border-color: rgba(255, 255, 255, 0.15);
}

/* ===== Header ===== */
.header {
    text-align: center;
    padding: var(--spacing-xl) 0;
    position: relative;
}

/* ===== Language Selector ===== */
.language-selector {
    position: absolute;
    top: var(--spacing-md);
    right: 0;
    z-index: 100;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--color-text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lang-btn:hover {
    background: var(--color-glass-hover);
    border-color: var(--color-primary);
}

.dropdown-arrow {
    font-size: 0.6rem;
    opacity: 0.7;
    transition: transform var(--transition-fast);
}

.lang-btn:hover .dropdown-arrow {
    transform: translateY(2px);
}

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--spacing-xs);
    background: rgba(15, 12, 41, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    min-width: 140px;
    box-shadow: var(--shadow-card);
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.lang-option {
    display: block;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--color-text-secondary);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lang-option:hover {
    background: var(--color-primary);
    color: white;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.logo-icon {
    font-size: var(--font-size-3xl);
    animation: sparkle 2s ease-in-out infinite;
}

@keyframes sparkle {

    0%,
    100% {
        transform: scale(1) rotate(0deg);
    }

    50% {
        transform: scale(1.1) rotate(10deg);
    }
}

.logo-text {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    font-weight: 500;
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* ===== Input Section ===== */
.input-section {
    padding: var(--spacing-xl);
}

.section-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.input-textarea {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    color: var(--color-text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    resize: none;
    transition: all var(--transition-base);
}

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

.input-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.2);
}

/* ===== API Key Section ===== */
.api-key-section {
    padding: var(--spacing-md);
}

.api-key-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.api-key-icon {
    font-size: var(--font-size-lg);
}

.api-key-title {
    font-size: var(--font-size-base);
    font-weight: 600;
}

.api-key-input-group {
    display: flex;
    gap: var(--spacing-sm);
}

.api-key-input {
    flex: 1;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
}

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

.api-key-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.save-api-btn {
    background: var(--color-primary);
    border: none;
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: white;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.save-api-btn:hover {
    background: var(--color-primary-light);
}

.save-api-btn.has-key {
    background: rgba(34, 197, 94, 0.2);
    color: #22c55e;
    border: 1px solid #22c55e;
}

.save-api-btn.has-key:hover {
    background: rgba(34, 197, 94, 0.3);
}

.api-key-hint {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: var(--spacing-sm);
}

/* ===== Selectors Row ===== */
.selectors-row {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

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

.selector-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Platform Buttons */
.platform-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.platform-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.platform-btn:hover:not(.locked) {
    background: var(--color-glass-hover);
    border-color: var(--color-primary);
    color: var(--color-text-primary);
}

.platform-btn.active {
    background: rgba(168, 85, 247, 0.2);
    border-color: var(--color-primary);
    color: var(--color-primary-light);
}

.platform-btn.locked {
    opacity: 0.5;
    cursor: not-allowed;
}

.platform-btn-icon {
    font-size: var(--font-size-base);
}

/* Tone Buttons */
.tone-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tone-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.tone-btn:hover:not(.locked) {
    background: var(--color-glass-hover);
    border-color: var(--color-primary);
    color: var(--color-text-primary);
}

.tone-btn.active {
    background: rgba(168, 85, 247, 0.2);
    border-color: var(--color-primary);
    color: var(--color-primary-light);
}

.tone-btn.locked {
    opacity: 0.5;
    cursor: not-allowed;
}

/* PRO Badge */
.pro-badge {
    position: absolute;
    top: -6px;
    right: -6px;
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
    font-size: 0.6rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Usage Counter */
.usage-counter {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    border-radius: var(--radius-sm);
    color: #22c55e;
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.usage-counter.exhausted {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

.usage-icon {
    font-size: var(--font-size-base);
}

/* ===== Generate Button ===== */
.generate-btn {
    width: 100%;
    margin-top: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.generate-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.generate-btn:hover::before {
    left: 100%;
}

.generate-btn:active {
    transform: translateY(0);
}

.generate-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-icon {
    font-size: var(--font-size-lg);
}

/* ===== Results Section ===== */
.results-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hidden {
    display: none !important;
}

/* ===== Result Card ===== */
.result-card {
    padding: var(--spacing-lg);
    animation: fadeInUp 0.5s ease backwards;
}

.result-card:nth-child(1) {
    animation-delay: 0.1s;
}

.result-card:nth-child(2) {
    animation-delay: 0.2s;
}

.result-card:nth-child(3) {
    animation-delay: 0.3s;
}

.result-card:nth-child(4) {
    animation-delay: 0.4s;
}

.card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-glass-border);
}

.platform-icon {
    font-size: var(--font-size-xl);
}

.platform-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

/* Platform-specific accents */
[data-platform="instagram"] .platform-name {
    background: var(--color-instagram);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

[data-platform="tiktok"] .platform-name {
    color: var(--color-tiktok);
}

[data-platform="linkedin"] .platform-name {
    color: var(--color-linkedin);
}

[data-platform="twitter"] .platform-name {
    color: var(--color-twitter);
}

.card-body {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* ===== Caption Group ===== */
.caption-group {
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    padding-top: 3.5rem;
    /* Space for Copy button */
    position: relative;
}

.caption-label {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary-light);
    margin-bottom: var(--spacing-xs);
}

.caption-text {
    font-size: var(--font-size-sm);
    line-height: 1.7;
    color: var(--color-text-secondary);
    white-space: pre-wrap;
    word-break: break-word;
}

/* ===== Copy Button ===== */
.copy-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--color-text-muted);
    font-family: var(--font-family);
    font-size: var(--font-size-xs);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.copy-btn.copied {
    background: #22c55e;
    color: white;
    border-color: #22c55e;
}

/* ===== Footer ===== */
.footer {
    text-align: center;
    padding: var(--spacing-xl) 0 var(--spacing-md);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* ===== Toast ===== */
.toast {
    position: fixed;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: linear-gradient(135deg, #22c55e, #16a34a);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 500;
    box-shadow: 0 10px 40px rgba(34, 197, 94, 0.3);
    transition: transform var(--transition-base);
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

.toast-icon {
    font-weight: bold;
}

/* ===== Responsive ===== */
@media (min-width: 768px) {
    .app-container {
        padding: var(--spacing-xl);
    }

    .logo-text {
        font-size: var(--font-size-4xl);
    }

    .input-section {
        padding: var(--spacing-2xl);
    }
}

/* ===== Loading State ===== */
.loading {
    pointer-events: none;
}

.loading .btn-text {
    opacity: 0;
}

.loading .btn-icon {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* ===== Paywall Modal ===== */
.paywall-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    padding: var(--spacing-md);
}

.paywall-modal.show {
    opacity: 1;
    visibility: visible;
}

.paywall-content {
    max-width: 400px;
    width: 100%;
    padding: var(--spacing-xl);
    text-align: center;
    position: relative;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.paywall-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    font-size: var(--font-size-lg);
    cursor: pointer;
    transition: color var(--transition-fast);
}

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

.paywall-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.paywall-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, #f59e0b, #fbbf24);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.paywall-message {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.paywall-features {
    list-style: none;
    text-align: left;
    margin-bottom: var(--spacing-xl);
}

.paywall-features li {
    padding: var(--spacing-sm) 0;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    border-bottom: 1px solid var(--color-glass-border);
}

.paywall-features li:last-child {
    border-bottom: none;
}

.paywall-btn {
    width: 100%;
    padding: var(--spacing-md);
    background: linear-gradient(135deg, #f59e0b, #d97706);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    margin-bottom: var(--spacing-sm);
}

.paywall-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(245, 158, 11, 0.3);
}

.paywall-skip {
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.paywall-skip:hover {
    color: var(--color-text-secondary);
}

/* ===== Paywall Pricing ===== */
.pricing-options {
    display: flex;
    gap: 10px;
    margin: 20px 0;
    justify-content: center;
}

.price-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 15px 10px;
    border-radius: 12px;
    width: 33%;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.price-card:hover {
    border-color: #a855f7;
    background: rgba(255, 255, 255, 0.08);
}

.price-card.featured {
    border-color: #a855f7;
    background: rgba(168, 85, 247, 0.15);
    transform: scale(1.05);
    box-shadow: 0 4px 20px rgba(168, 85, 247, 0.3);
    z-index: 10;
}

.price-period {
    font-size: 0.8rem;
    opacity: 0.8;
    margin-bottom: 5px;
}

.price-amount {
    font-size: 1.1rem;
    font-weight: 700;
    color: white;
}

.price-note {
    font-size: 0.65rem;
    color: #a855f7;
    margin-top: 5px;
    font-weight: 600;
}