/* ===========================
   CSS Variables & Reset
   =========================== */
:root {
    --primary: #E8E0F0;
    --secondary: #F5E6E8;
    --accent: #E0EBE4;
    --text: #2D2D2D;
    --text-light: #5A5A5A;
    --background: #FDFBF9;
    --white: #FFFFFF;

    --font-display: 'Cormorant Garamond', serif;
    --font-body: 'Montserrat', sans-serif;

    --transition: all 0.3s ease;
}

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

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

body {
    font-family: var(--font-body);
    background-color: var(--background);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    position: relative;
}

/* ===========================
   Premium Background
   =========================== */
.gradient-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;

    /* Warm cream base with soft radial light */
    background:
        radial-gradient(ellipse at 30% 20%, rgba(248, 240, 235, 0.8) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(240, 235, 245, 0.6) 0%, transparent 50%),
        linear-gradient(180deg, #FAF8F6 0%, #F5F2EF 100%);
}

/* Subtle texture overlay */
.gradient-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.08;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.5' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%' height='100%' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* Soft glow accent */
.gradient-bg::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 60%;
    background: radial-gradient(ellipse, rgba(255, 252, 250, 0.9) 0%, transparent 70%);
    pointer-events: none;
}

/* Molecular structure in background */
.molecule-svg {
    position: fixed;
    pointer-events: none;
}

.molecule-logo {
    top: 0;
    left: 50%;
    transform: translateX(calc(-50% - 360px));
    width: 120px;
    height: 100vh;
    animation: floatMolecule 25s ease-in-out infinite;
}

@keyframes floatMolecule {
    0%, 100% { transform: translateX(calc(-50% - 360px)); }
    50% { transform: translateX(calc(-50% - 370px)); }
}

/* Hide molecule on smaller screens */
@media (max-width: 768px) {
    .molecule-logo {
        display: none;
    }
}

/* ===========================
   Main Container
   =========================== */
.container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    min-height: calc(100vh - 60px);
}

.content {
    text-align: center;
    max-width: 500px;
    width: 100%;
}

/* ===========================
   Logo
   =========================== */
.logo {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 300;
    letter-spacing: 0.15em;
    color: var(--text);
    margin-bottom: 1rem;
    text-transform: lowercase;
}

/* ===========================
   Tagline
   =========================== */
.tagline {
    font-family: var(--font-body);
    font-size: clamp(1.1rem, 3vw, 1.4rem);
    font-weight: 400;
    color: var(--text);
    letter-spacing: 0.05em;
    margin-bottom: 3rem;
}

/* ===========================
   Signup Box (Glassmorphism)
   =========================== */
.signup-box {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-radius: 20px;
    padding: 2.5rem 2rem;
    box-shadow:
        0 8px 32px rgba(0, 0, 0, 0.06),
        0 2px 8px rgba(0, 0, 0, 0.04);
}

.signup-form {
    width: 100%;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group input {
    width: 100%;
    padding: 1rem 1.25rem;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 300;
    color: var(--text);
    background: var(--white);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 12px;
    outline: none;
    transition: var(--transition);
}

.form-group input::placeholder {
    color: #999;
}

.form-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(232, 224, 240, 0.5);
}

.form-group button {
    width: 100%;
    padding: 1rem 2rem;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text);
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.form-group button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(232, 224, 240, 0.6);
}

.form-group button:active {
    transform: translateY(0);
}

.form-group button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* Loading Spinner */
.btn-loading {
    align-items: center;
    justify-content: center;
}

.spinner {
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    100% { transform: rotate(360deg); }
}

/* Form Message */
.form-message {
    font-size: 0.875rem;
    font-weight: 400;
}

.form-message:not(:empty) {
    margin-top: 1rem;
}

.form-message.success {
    color: #4A7C59;
}

.form-message.error {
    color: #C45C5C;
}

/* ===========================
   Footer
   =========================== */
.footer {
    text-align: center;
    padding: 1.5rem 2rem;
}

.footer p {
    font-size: 0.75rem;
    font-weight: 300;
    color: var(--text-light);
    letter-spacing: 0.05em;
}

/* ===========================
   Responsive Design
   =========================== */
@media (min-width: 640px) {
    .form-group {
        flex-direction: row;
    }

    .form-group input {
        flex: 1;
    }

    .form-group button {
        width: auto;
        white-space: nowrap;
    }
}

@media (max-width: 480px) {
    .signup-box {
        padding: 2rem 1.5rem;
    }

    .tagline {
        margin-bottom: 2rem;
    }
}


/* Focus visible for keyboard navigation */
button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--text);
    outline-offset: 2px;
}