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

:root {
    --bg: #0f0f13;
    --card-bg: rgba(22, 22, 30, 0.85);
    --card-border: rgba(255, 255, 255, 0.06);
    --text-primary: #f0f0f5;
    --text-secondary: #8888a0;
    --accent: #6c5ce7;
    --accent-hover: #7f6ff0;
    --accent-glow: rgba(108, 92, 231, 0.25);
    --divider: rgba(255, 255, 255, 0.06);
    --contact-bg: rgba(255, 255, 255, 0.04);
    --contact-hover: rgba(255, 255, 255, 0.08);
    --btn-secondary-bg: rgba(255, 255, 255, 0.06);
    --btn-secondary-hover: rgba(255, 255, 255, 0.1);
    --toast-bg: #1e1e2e;
    --shadow: 0 25px 60px rgba(0, 0, 0, 0.5);
}

[data-theme="light"] {
    --bg: #f5f5fa;
    --card-bg: rgba(255, 255, 255, 0.85);
    --card-border: rgba(0, 0, 0, 0.08);
    --text-primary: #1a1a2e;
    --text-secondary: #6b6b80;
    --accent: #6c5ce7;
    --accent-hover: #5a4bd1;
    --accent-glow: rgba(108, 92, 231, 0.15);
    --divider: rgba(0, 0, 0, 0.08);
    --contact-bg: rgba(0, 0, 0, 0.04);
    --contact-hover: rgba(0, 0, 0, 0.08);
    --btn-secondary-bg: rgba(0, 0, 0, 0.06);
    --btn-secondary-hover: rgba(0, 0, 0, 0.1);
    --toast-bg: #2a2a3e;
    --shadow: 0 25px 60px rgba(0, 0, 0, 0.1);
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    transition: background 0.4s ease, color 0.4s ease;
    position: relative;
    overflow-x: hidden;
}

/* ===== Background image ===== */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 20% 20%, rgba(108, 92, 231, 0.15) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 80% 80%, rgba(108, 92, 231, 0.1) 0%, transparent 60%),
        url('bg-image.jpg') center / cover no-repeat;
    pointer-events: none;
    z-index: 0;
}

/* Dark overlay on top of background for readability */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.35);
    pointer-events: none;
    z-index: 0;
}

/* ===== Card ===== */
.card {
    position: relative;
    width: 100%;
    max-width: 420px;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 2.5rem 2rem;
    box-shadow: var(--shadow);
    transition: background 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
    z-index: 1;
    overflow: hidden;
}

.card__glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(
        circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
        var(--accent-glow) 0%,
        transparent 60%
    );
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    z-index: -1;
}

.card:hover .card__glow {
    opacity: 1;
}

/* ===== Header ===== */
.card__header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.card__avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #a29bfe);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
    box-shadow: 0 8px 32px var(--accent-glow);
    transition: box-shadow 0.3s ease;
}

.card__avatar-letter {
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
    user-select: none;
}

.card__name {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.35rem;
    transition: color 0.4s ease;
}

.card__title {
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--text-secondary);
    transition: color 0.4s ease;
}

/* ===== Divider ===== */
.card__divider {
    height: 1px;
    background: var(--divider);
    margin-bottom: 1.5rem;
    transition: background 0.4s ease;
}

/* ===== Body ===== */
.card__body {
    margin-bottom: 1.5rem;
}

.card__bio {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 1.5rem;
    transition: color 0.4s ease;
}

/* ===== Contacts ===== */
.card__contacts {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.card__contact {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    background: var(--contact-bg);
    text-decoration: none;
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: background 0.25s ease, color 0.25s ease, transform 0.2s ease;
}

.card__contact:hover {
    background: var(--contact-hover);
    transform: translateX(4px);
}

.card__contact-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--accent);
    transition: color 0.25s ease;
}

/* ===== Footer / Buttons ===== */
.card__footer {
    display: flex;
    gap: 0.75rem;
}

.card__btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 12px;
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.25s ease, color 0.25s ease, transform 0.2s ease, box-shadow 0.25s ease;
}

.card__btn:active {
    transform: scale(0.97);
}

.card__btn--primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 4px 16px var(--accent-glow);
}

.card__btn--primary:hover {
    background: var(--accent-hover);
    box-shadow: 0 6px 24px var(--accent-glow);
}

.card__btn--secondary {
    background: var(--btn-secondary-bg);
    color: var(--text-primary);
}

.card__btn--secondary:hover {
    background: var(--btn-secondary-hover);
}

.card__btn-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.card__btn-icon--sun,
.card__btn-icon--moon {
    display: none;
}

[data-theme="dark"] .card__btn-icon--sun {
    display: block;
}

[data-theme="light"] .card__btn-icon--moon {
    display: block;
}

/* ===== Toast ===== */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    background: var(--toast-bg);
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    opacity: 0;
    transition: opacity 0.35s ease, transform 0.35s ease;
    z-index: 100;
    pointer-events: none;
}

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

/* ===== Responsive ===== */
@media (max-width: 480px) {
    body {
        padding: 1rem;
    }

    .card {
        padding: 2rem 1.5rem;
        border-radius: 20px;
    }

    .card__avatar {
        width: 68px;
        height: 68px;
    }

    .card__avatar-letter {
        font-size: 1.625rem;
    }

    .card__name {
        font-size: 1.3rem;
    }

    .card__footer {
        flex-direction: column;
    }
}

@media (max-width: 360px) {
    .card {
        padding: 1.5rem 1rem;
    }

    .card__contact {
        font-size: 0.8rem;
        padding: 0.625rem 0.75rem;
    }
}

/* ===== Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }

    .card:hover .card__glow {
        opacity: 0;
    }

    .card__contact:hover {
        transform: none;
    }

    .card__btn:active {
        transform: none;
    }
}