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

:root {
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-900: #0f172a;
    --blue-500: #3b82f6;
    --blue-600: #2563eb;
    --blue-700: #1d4ed8;
    --green-50: #f0fdf4;
    --green-200: #bbf7d0;
    --green-500: #22c55e;
    --green-600: #16a34a;
    --green-700: #15803d;
    --red-500: #ef4444;
    --red-600: #dc2626;
    --white: #ffffff;
    --black: #000000;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--white);
    color: var(--slate-900);
    line-height: 1.5;
    min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.25;
}

.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 1.875rem; }
.text-4xl { font-size: 2.25rem; }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-mono { font-family: 'Courier New', monospace; }

.text-center { text-align: center; }
.text-left { text-align: left; }

.text-slate-400 { color: var(--slate-400); }
.text-slate-500 { color: var(--slate-500); }
.text-slate-600 { color: var(--slate-600); }
.text-slate-700 { color: var(--slate-700); }
.text-slate-900 { color: var(--slate-900); }
.text-blue-500 { color: var(--blue-500); }
.text-blue-600 { color: var(--blue-600); }
.text-green-500 { color: var(--green-500); }
.text-green-600 { color: var(--green-600); }
.text-red-500 { color: var(--red-500); }
.text-white { color: var(--white); }

/* Layout */
.min-h-screen { min-height: 100vh; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-grow { flex-grow: 1; }
.flex-shrink { flex-shrink: 1; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }

/* Spacing */
.p-2 { padding: 0.5rem; }
.p-3 { padding: 0.75rem; }
.p-4 { padding: 1rem; }
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }
.px-2 { padding-left: 0.5rem; padding-right: 0.5rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-3 { padding-top: 0.75rem; padding-bottom: 0.75rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
.py-6 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.py-8 { padding-top: 2rem; padding-bottom: 2rem; }
.pt-3 { padding-top: 0.75rem; }
.pt-4 { padding-top: 1rem; }
.pt-6 { padding-top: 1.5rem; }
.pt-8 { padding-top: 2rem; }
.pb-12 { padding-bottom: 3rem; }
.pl-10 { padding-left: 2.5rem; }
.pl-12 { padding-left: 3rem; }
.pl-14 { padding-left: 3.5rem; }
.pl-16 { padding-left: 4rem; }
.pl-4 { padding-left: 1rem; }

.m-0 { margin: 0; }
.m-4 { margin: 1rem; }
.mx-auto { margin-left: auto; margin-right: auto; }
.my-4 { margin-top: 1rem; margin-bottom: 1rem; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mr-2 { margin-right: 0.5rem; }

/* Width & Max Width */
.w-full { width: 100%; }
.w-8 { width: 2rem; }
.w-10 { width: 2.5rem; }
.w-12 { width: 3rem; }
.w-14 { width: 3.5rem; }
.w-16 { width: 4rem; }
.w-20 { width: 5rem; }
.w-32 { width: 8rem; }
.w-40 { width: 10rem; }
.w-48 { width: 12rem; }
.w-64 { width: 16rem; }
.w-80 { width: 20rem; }
.w-96 { width: 24rem; }
.max-w-md { max-width: 28rem; }
.max-w-lg { max-width: 32rem; }
.max-w-xl { max-width: 36rem; }
.max-w-2xl { max-width: 42rem; }
.max-w-3xl { max-width: 48rem; }
.max-w-4xl { max-width: 56rem; }
.max-w-5xl { max-width: 64rem; }
.max-w-6xl { max-width: 72rem; }

/* Height */
.h-8 { height: 2rem; }
.h-10 { height: 2.5rem; }
.h-12 { height: 3rem; }
.h-14 { height: 3.5rem; }
.h-16 { height: 4rem; }
.h-20 { height: 5rem; }
.h-32 { height: 8rem; }
.h-40 { height: 10rem; }
.h-48 { height: 12rem; }
.h-64 { height: 16rem; }
.h-80 { height: 20rem; }
.h-96 { height: 24rem; }
.min-h-96 { min-height: 24rem; }
.max-h-96 { max-height: 24rem; }

/* Border */
.border { border-width: 1px; }
.border-2 { border-width: 2px; }
.border-t { border-top-width: 1px; }
.border-b { border-bottom-width: 1px; }
.border-l { border-left-width: 1px; }
.border-r { border-right-width: 1px; }
.border-slate-100 { border-color: var(--slate-100); }
.border-slate-200 { border-color: var(--slate-200); }
.border-slate-300 { border-color: var(--slate-300); }
.border-green-200 { border-color: var(--green-200); }
.border-white\/20 { border-color: rgba(255, 255, 255, 0.2); }
.border-transparent { border-color: transparent; }
.rounded { border-radius: 0.25rem; }
.rounded-lg { border-radius: 0.5rem; }
.rounded-xl { border-radius: 0.75rem; }
.rounded-2xl { border-radius: 1rem; }
.rounded-full { border-radius: 9999px; }

/* Background */
.bg-white { background-color: var(--white); }
.bg-slate-50 { background-color: var(--slate-50); }
.bg-slate-100 { background-color: var(--slate-100); }
.bg-slate-200 { background-color: var(--slate-200); }
.bg-slate-900 { background-color: var(--slate-900); }
.bg-blue-500 { background-color: var(--blue-500); }
.bg-blue-600 { background-color: var(--blue-600); }
.bg-blue-700 { background-color: var(--blue-700); }
.bg-green-50 { background-color: var(--green-50); }
.bg-green-600 { background-color: var(--green-600); }
.bg-red-600 { background-color: var(--red-600); }
.bg-black\/50 { background-color: rgba(0, 0, 0, 0.5); }
.bg-gradient-to-br { background-image: linear-gradient(to bottom right, var(--tw-gradient-from), var(--tw-gradient-to)); }
.from-blue-500 { --tw-gradient-from: var(--blue-500); --tw-gradient-to: rgba(59, 130, 246, 0); --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to); }
.to-blue-700 { --tw-gradient-to: var(--blue-700); }

/* Shadow */
.shadow-sm { box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05); }
.shadow { box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06); }
.shadow-lg { box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05); }
.shadow-xl { box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04); }
.shadow-2xl { box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25); }

/* Position */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.inset-0 { top: 0; right: 0; bottom: 0; left: 0; }
.top-0 { top: 0; }
.right-0 { right: 0; }
.bottom-0 { bottom: 0; }
.left-0 { left: 0; }
.top-1\/2 { top: 50%; }
.left-1\/2 { left: 50%; }
.left-3 { left: 0.75rem; }
.left-4 { left: 1rem; }
.right-4 { right: 1rem; }
.bottom-4 { bottom: 1rem; }
.-translate-y-1\/2 { transform: translateY(-50%); }
.-translate-x-1\/2 { transform: translateX(-50%); }
.translate-x-1\/2 { transform: translateX(50%); }
.-translate-y-1\/2 { transform: translateY(-50%); }

/* Z-index */
.z-10 { z-index: 10; }
.z-50 { z-index: 50; }

/* Display */
.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }
.hidden { display: none; }

/* Grid */
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-y-auto { overflow-y: auto; }
.overflow-x-auto { overflow-x: auto; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.whitespace-pre-line { white-space: pre-line; }
.whitespace-nowrap { white-space: nowrap; }

/* Transform */
.-translate-y-1\/2 { transform: translateY(-50%); }
.translate-x-1\/2 { transform: translateX(50%); }
.-translate-y-1\/2 { transform: translateY(-50%); }
.rotate-180 { transform: rotate(180deg); }

/* Transitions */
.transition { transition-property: color, background-color, border-color, text-decoration-color, fill, stroke, opacity, box-shadow, transform, filter, backdrop-filter; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
.transition-all { transition-property: all; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
.transition-colors { transition-property: color, background-color, border-color, text-decoration-color, fill, stroke; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }

/* Cursor */
.cursor-pointer { cursor: pointer; }

/* Opacity */
.opacity-5 { opacity: 0.05; }
.opacity-60 { opacity: 0.6; }

/* Backdrop */
.backdrop-filter { backdrop-filter: blur(8px); }
.backdrop-blur-sm { backdrop-filter: blur(4px); }

/* Animations */
@keyframes spin {
    to { transform: rotate(360deg); }
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}
.animate-spin { animation: spin 1s linear infinite; }
.animate-pulse { animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite; }

/* Forms */
input, textarea, button, select {
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
}

input[type="text"],
input[type="password"],
input[type="email"],
input[type="url"],
input[type="number"],
textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--slate-300);
    border-radius: 0.5rem;
    outline: none;
    transition: all 0.15s ease;
}

input[type="text"]:focus,
input[type="password"]:focus,
input[type="email"]:focus,
input[type="url"]:focus,
input[type="number"]:focus,
textarea:focus {
    border-color: var(--blue-500);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.1);
}

input::placeholder,
textarea::placeholder {
    color: var(--slate-400);
}

textarea {
    resize: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
}

/* Buttons */
button, .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-weight: 500;
    border-radius: 0.5rem;
    transition: all 0.15s ease;
}

.btn-primary {
    background-color: var(--blue-600);
    color: var(--white);
    padding: 0.75rem 1.5rem;
}

.btn-primary:hover {
    background-color: var(--blue-700);
}

.btn-secondary {
    background-color: var(--slate-100);
    color: var(--slate-700);
    padding: 0.5rem 1rem;
}

.btn-secondary:hover {
    background-color: var(--slate-200);
}

.btn-success {
    background-color: var(--green-600);
    color: var(--white);
    padding: 0.75rem 1.5rem;
}

.btn-success:hover {
    background-color: var(--green-700);
}

.btn-danger {
    background-color: var(--red-600);
    color: var(--white);
    padding: 0.75rem 1.5rem;
}

.btn-danger:hover {
    background-color: var(--red-700);
}

/* Links */
a {
    color: var(--blue-600);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Utilities */
.break-all { word-break: break-all; }
.object-contain { object-fit: contain; }
.object-cover { object-fit: cover; }

/* Scrollbar hiding */
::-webkit-scrollbar {
    width: 0;
    background: transparent;
}

/* Responsive */
@media (min-width: 768px) {
    .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .md\:divide-x > * + * { border-left-width: 1px; }
    .md\:divide-y-0 { border-top-width: 0; border-bottom-width: 0; }
    .md\:h-auto { height: auto; }
}

/* Specific component styles */
.payment-card {
    transition: all 0.2s ease;
    cursor: pointer;
}

.payment-card:hover {
    background-color: var(--slate-50);
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
}

.payment-card:active {
    transform: translateY(0);
}

.card-input {
    transition: all 0.2s ease;
}

.card-input:focus {
    border-color: var(--blue-600);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--slate-200);
    border-top-color: var(--blue-600);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.timer-highlight {
    color: var(--slate-900);
    font-weight: 600;
}

/* Overlay styles */
.overlay {
    backdrop-filter: blur(8px);
    background-color: rgba(255, 255, 255, 0.9);
}