:root {
    --bg-color: #020617; /* bg-slate-950 */
    --text-white: #ffffff;
    --text-slate-300: #cbd5e1;
    --text-slate-400: #94a3b8;
    --text-slate-500: #64748b;
    --indigo-600: #4f46e5;
    --indigo-500: #6366f1;
    --rose-600: #e11d48;
    --card-bg: rgba(15, 23, 42, 0.6); /* bg-slate-900/60 */
    --card-border: rgba(51, 65, 85, 0.5); /* border-slate-700/50 */
    --card-border-hover: rgba(71, 85, 105, 0.5); /* border-slate-600/50 */
    --input-bg: rgba(30, 41, 59, 0.5); /* bg-slate-800/50 */
    --input-border: #334155; /* border-slate-700 */
    --error: #ef4444;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-white);
    min-height: 100vh;
}

.main-container {
    min-height: 100vh;
    position: relative;
    overflow: hidden;
    padding: 5rem 1.5rem; /* py-20 px-6 */
}

/* Background decorations */
.bg-decoration {
    position: absolute;
    width: 40%;
    height: 40%;
    border-radius: 50%;
    filter: blur(120px);
    pointer-events: none;
}

.dec-left {
    top: -10%;
    left: -10%;
    background-color: rgba(79, 70, 229, 0.2); /* bg-indigo-600/20 */
}

.dec-right {
    bottom: -10%;
    right: -10%;
    background-color: rgba(225, 29, 72, 0.2); /* bg-rose-600/20 */
}

.content-wrapper {
    max-width: 72rem; /* max-w-6xl */
    margin: 0 auto;
    position: relative;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Header / Form Section */
.form-section {
    width: 100%;
    max-width: 28rem; /* max-w-md */
    margin-bottom: 8rem; /* mb-32 */
}

.glass-card {
    background-color: var(--card-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--card-border);
    border-radius: 1rem; /* rounded-2xl */
    padding: 2rem; /* p-8 */
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25); /* shadow-2xl */
    transition: all 0.3s ease;
}

.glass-card:hover {
    border-color: var(--card-border-hover);
}

.card-header {
    text-align: center;
    margin-bottom: 2rem; /* mb-8 */
}

.card-header h1 {
    font-size: 1.875rem; /* text-3xl */
    line-height: 2.25rem;
    font-weight: 800; /* font-extrabold */
    letter-spacing: -0.025em; /* tracking-tight */
    margin-bottom: 0.5rem; /* mb-2 */
}

.card-header p {
    color: var(--text-slate-400);
    font-size: 0.875rem; /* text-sm */
}

.checkout-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem; /* space-y-6 */
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem; /* space-y-2 */
}

.input-group label {
    font-size: 0.875rem; /* text-sm */
    font-weight: 500; /* font-medium */
    color: var(--text-slate-300);
}

.input-group input {
    width: 100%;
    padding: 0.75rem 1rem; /* py-3 px-4 */
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 0.75rem; /* rounded-xl */
    color: var(--text-white);
    font-family: inherit;
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
}

.input-group input::placeholder {
    color: var(--text-slate-500);
}

.input-group input:focus {
    border-color: transparent;
    box-shadow: 0 0 0 2px var(--indigo-500);
}

.input-group input.invalid {
    border-color: transparent;
    box-shadow: 0 0 0 2px var(--error);
}

.input-help {
    font-size: 0.75rem; /* text-xs */
    color: var(--text-slate-400);
    margin-top: 0.5rem; /* mt-2 */
    line-height: 1.625; /* leading-relaxed */
}

.submit-btn {
    width: 100%;
    position: relative;
    overflow: hidden;
    border-radius: 0.75rem; /* rounded-xl */
    background-color: var(--indigo-600);
    padding: 0.75rem 1.5rem; /* px-6 py-3 */
    color: var(--text-white);
    font-weight: 500; /* font-medium */
    border: none;
    cursor: pointer;
    box-shadow: 0 0 40px -10px rgba(79, 70, 229, 0.5);
    transition: all 0.2s ease;
    font-family: inherit;
    font-size: 1rem;
}

.submit-btn:hover {
    box-shadow: 0 0 60px -15px rgba(79, 70, 229, 0.7);
    background-color: var(--indigo-500);
}

.submit-btn:active {
    transform: scale(0.98);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.btn-content {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-icon {
    width: 1rem;
    height: 1rem;
    transition: transform 0.2s ease;
}

.submit-btn:hover .btn-icon {
    transform: translateX(4px);
}

.powered-by {
    margin-top: 1.5rem; /* mt-6 */
    text-align: center;
    font-size: 0.75rem; /* text-xs */
    color: var(--text-slate-500);
}

/* Videos Section */
.videos-section {
    width: 100%;
    padding-bottom: 5rem; /* pb-20 */
}

.videos-header {
    text-align: center;
    margin-bottom: 5rem; /* mb-20 */
}

.videos-header h2 {
    font-size: 2.25rem; /* text-4xl */
    font-weight: 800; /* font-extrabold */
    margin-bottom: 1.5rem; /* mb-6 */
    letter-spacing: -0.025em; /* tracking-tight */
}

@media (min-width: 768px) {
    .videos-header h2 {
        font-size: 3rem; /* md:text-5xl */
    }
}

.videos-header p {
    color: var(--text-slate-400);
    font-size: 1.125rem; /* text-lg */
    max-width: 42rem; /* max-w-2xl */
    margin: 0 auto;
}

@media (min-width: 768px) {
    .videos-header p {
        font-size: 1.25rem; /* md:text-xl */
    }
}

.videos-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem; /* gap-12 */
    padding: 0 1rem; /* px-4 */
}

@media (min-width: 768px) {
    .videos-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 2rem; /* md:gap-8 */
    }
}

.video-card {
    display: flex;
    flex-direction: column;
    align-items: center;
}

@media (min-width: 768px) {
    .video-card-2 {
        margin-top: 4rem; /* md:mt-16 */
    }
    
    .video-card-3 {
        margin-top: 8rem; /* md:mt-32 */
    }
}

.phone-mockup {
    width: 100%;
    max-width: 280px;
    aspect-ratio: 9/19.5;
    background-color: #0f172a; /* bg-slate-900 */
    border-radius: 3rem; /* rounded-[3rem] */
    padding: 0.75rem; /* p-3 */
    border: 4px solid #1e293b; /* border-slate-800 */
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
    transition: transform 0.5s ease;
}

.phone-mockup:hover {
    transform: translateY(-8px); /* hover:-translate-y-2 */
}

.phone-mockup video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 2.2rem; /* rounded-[2.2rem] */
    background-color: #000;
}

.video-card h3 {
    font-size: 1.5rem; /* text-2xl */
    font-weight: 700; /* font-bold */
    margin-top: 2.5rem; /* mt-10 */
    margin-bottom: 0.75rem; /* mb-3 */
}

.video-card p {
    color: var(--text-slate-400);
    text-align: center;
    line-height: 1.625; /* leading-relaxed */
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(8px);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--card-border);
    font-weight: 500;
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.error {
    border-left: 4px solid var(--error);
}