@import url('https://fonts.googleapis.com/css2?family=Caveat:wght@400;600;700&family=Inter:wght@300;400;500;600&display=swap');

:root {
    --bg: #f5f0e8;
    --fg: #1a1a1a;
    --fg-muted: #5a5549;
    --accent: #c8b89a;
    --accent-dark: #a89878;
    --border: #d4cbbf;
    --font-display: 'Caveat', cursive;
    --font-body: 'Inter', sans-serif;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg: #000000;
    --fg: #e8e0d4;
    --fg-muted: #9a9084;
    --accent: #c8b89a;
    --accent-dark: #8a7a5a;
    --border: #1a1a1a;
}

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

body {
    font-family: var(--font-body);
    background: radial-gradient(circle at 20% 20%, rgba(200,184,154,0.15), transparent 38%), var(--bg);
    color: var(--fg);
    min-height: 100vh;
    transition: background var(--transition), color var(--transition);
}

body::after {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    background: radial-gradient(circle at 50% 50%, rgba(212,190,149,0.24), rgba(212,190,149,0) 55%);
    opacity: 0;
    z-index: 998;
}

body.theme-transition::after {
    animation: themePulse 0.5s ease;
}

header {
    position: fixed;
    top: 1rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    max-width: calc(100% - 2rem);
}

.header-inner {
    margin: 0 auto;
    padding: 0 1.5rem;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(30px) saturate(1.8);
    -webkit-backdrop-filter: blur(30px) saturate(1.8);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 999px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.08), inset 0 1px 0 rgba(255,255,255,0.3);
}

[data-theme="dark"] .header-inner {
    background: rgba(0,0,0,0.5);
    border-color: rgba(255,255,255,0.05);
    box-shadow: 0 8px 32px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.04);
}

.logo { display: flex; align-items: center; text-decoration: none; }
.logo img { height: 38px; width: auto; border-radius: 6px; }

.header-separator {
    width: 1px;
    height: 24px;
    background: linear-gradient(180deg, transparent, var(--accent), transparent);
    margin: 0 0.75rem;
    opacity: 0.6;
}

.nav-desktop { display: flex; gap: 0.25rem; }
.nav-desktop a {
    color: var(--fg-muted);
    text-decoration: none;
    font-size: 0.85rem;
    padding: 0.4rem 0.8rem;
    border-radius: 999px;
    transition: all var(--transition);
}
.nav-desktop a:hover {
    color: var(--fg);
    background: rgba(200,184,154,0.15);
}

.header-actions { display: flex; align-items: center; gap: 0.5rem; }

#theme-toggle,
#home-btn {
    background: none;
    border: 1px solid rgba(200,184,154,0.3);
    color: var(--fg);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all var(--transition);
}

#theme-toggle:hover,
#home-btn:hover {
    background: var(--accent);
    color: var(--bg);
    border-color: var(--accent);
    transform: scale(1.08);
}

#theme-toggle:hover { transform: rotate(30deg) scale(1.08); }

.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 28px;
    height: 22px;
    position: relative;
    z-index: 200;
    padding: 0;
}
.hamburger span {
    display: block;
    height: 1.5px;
    background: var(--fg);
    position: absolute;
    left: 0;
    border-radius: 2px;
    transform-origin: center;
    transition: all 0.45s cubic-bezier(0.23, 1, 0.32, 1);
}
.hamburger span:nth-child(1) { top: 2px; width: 100%; }
.hamburger span:nth-child(2) { top: 10px; width: 60%; }
.hamburger span:nth-child(3) { top: 18px; width: 100%; }
.hamburger:hover span:nth-child(2) { width: 100%; }
.hamburger.active span:nth-child(1) { top: 10px; transform: rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.active span:nth-child(3) { top: 10px; transform: rotate(-45deg); }

.mobile-menu {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 99;
    background: var(--bg);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}
.mobile-menu.open { opacity: 1; visibility: visible; }

.mobile-menu a {
    font-family: var(--font-display);
    font-size: 2.6rem;
    color: var(--fg);
    text-decoration: none;
    padding: 1.2rem 3rem;
    border-bottom: 1px solid var(--border);
    width: 80%;
    text-align: center;
    transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), color var(--transition), background var(--transition);
}
.mobile-menu a:first-child { border-top: 1px solid var(--border); }
.mobile-menu a:hover {
    color: var(--accent-dark);
    background: rgba(200,184,154,0.12);
    transform: translateX(8px) scale(1.02);
}

.mobile-menu-actions {
    margin-top: 2rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.mobile-home,
#theme-toggle-mobile {
    border: 1px solid rgba(200,184,154,0.3);
    color: var(--fg);
    width: 52px;
    height: 52px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    background: none;
    cursor: pointer;
    transition: all var(--transition);
    font-size: 1.1rem;
}

.mobile-home:hover,
#theme-toggle-mobile:hover {
    background: var(--accent);
    color: var(--bg);
    border-color: var(--accent);
    transform: scale(1.08);
}

#theme-toggle-mobile:hover {
    transform: rotate(30deg) scale(1.08);
}

.auth-wrap {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 6.5rem 1rem 2rem;
}

.liquid-glass {
    background: rgba(255,255,255,0.28);
    border: 1px solid rgba(255,255,255,0.4);
    border-radius: 24px;
    backdrop-filter: blur(24px) saturate(1.8);
    -webkit-backdrop-filter: blur(24px) saturate(1.8);
    box-shadow: 0 12px 40px rgba(0,0,0,0.12), inset 0 1px 0 rgba(255,255,255,0.3);
}

[data-theme="dark"] .liquid-glass {
    background: rgba(10,10,10,0.52);
    border-color: rgba(255,255,255,0.08);
}

.auth-card {
    width: min(460px, 100%);
    padding: 2rem;
}

.auth-card h1 {
    font-family: var(--font-display);
    font-size: 3rem;
    text-align: center;
    margin-bottom: 0.25rem;
}

.subtitle {
    text-align: center;
    color: var(--fg-muted);
    margin-bottom: 1.5rem;
}

.auth-form {
    display: grid;
    gap: 0.75rem;
}

.auth-form label {
    font-size: 0.9rem;
    color: var(--fg-muted);
}

.auth-form input {
    height: 46px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: rgba(255,255,255,0.4);
    color: var(--fg);
    padding: 0 0.9rem;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition), transform var(--transition);
}

.auth-form input:hover {
    border-color: rgba(183,157,117,0.9);
    box-shadow: 0 8px 18px rgba(183,157,117,0.15);
    transform: translateY(-1px);
}

[data-theme="dark"] .auth-form input {
    background: rgba(25,25,25,0.6);
}

.auth-form input:focus {
    border-color: var(--accent-dark);
    box-shadow: 0 0 0 4px rgba(200,184,154,0.15);
}

.submit-btn {
    margin-top: 0.7rem;
    height: 48px;
    border: none;
    border-radius: 14px;
    background: linear-gradient(135deg, #e4d2ae, #c1a073 52%, #a7865e);
    color: #1d1710;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.25s ease, box-shadow 0.25s ease, filter 0.25s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    letter-spacing: 0.02em;
    box-shadow: 0 10px 20px rgba(183,157,117,0.28), inset 0 1px 0 rgba(255,255,255,0.42);
}

.submit-btn:hover {
    transform: translateY(-3px) scale(1.01);
    box-shadow: 0 14px 30px rgba(183,157,117,0.42), inset 0 1px 0 rgba(255,255,255,0.55);
    filter: brightness(1.08);
}

.submit-btn i {
    transition: transform 0.25s ease;
}

.submit-btn:hover i {
    transform: translateX(3px);
}

.toast {
    position: fixed;
    left: 50%;
    bottom: 2rem;
    transform: translateX(-50%);
    z-index: 999;
    padding: 1rem 1.25rem;
    border-radius: 16px;
    border: 1px solid rgba(255,255,255,0.35);
    background: rgba(255,255,255,0.3);
    color: var(--fg);
    backdrop-filter: blur(18px) saturate(1.6);
    -webkit-backdrop-filter: blur(18px) saturate(1.6);
    box-shadow: 0 12px 34px rgba(0,0,0,0.18);
    display: flex;
    align-items: center;
    gap: 0.55rem;
    animation: toastIn 0.35s ease-out;
}

.toast-success i { color: #3b7d4f; }
.toast-error i { color: #9b3f3f; }
.toast-db i { color: #80643f; }

@keyframes toastIn {
    from { opacity: 0; transform: translateX(-50%) translateY(14px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@keyframes themePulse {
    0% { opacity: 0; transform: scale(0.94); }
    45% { opacity: 1; transform: scale(1); }
    100% { opacity: 0; transform: scale(1.06); }
}

@media (max-width: 768px) {
    header { top: 0.5rem; left: 0.5rem; right: 0.5rem; transform: none; max-width: none; }
    .header-inner { height: 54px; justify-content: space-between; width: 100%; }
    .logo img { height: 32px; }
    .nav-desktop { display: none; }
    .header-separator { display: none; }
    .hamburger { display: block; }
    .mobile-menu { display: flex; }
    #home-btn.desktop-only { display: none; }
    #theme-toggle { display: none; }
    .auth-card { padding: 1.35rem; }
    .auth-card h1 { font-size: 2.4rem; }
}