/* ============================================================= */
/* FACE SEARCH AI — CUSTOMER LOGIN — PREMIUM VISUAL THEME        */
/* Presentation layer only. HTML/JS class & id hooks preserved.  */
/* ============================================================= */

/* ----------------------- Design Tokens ----------------------- */
:root {
    --brand: #6366f1;
    --brand-deep: #4f46e5;
    --accent: #8b5cf6;
    --grad-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --grad-primary-hover: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);

    --danger: #f43f5e;
    --danger-deep: #e11d48;

    --base: #f6f7fb;
    --surface: #ffffff;
    --text-strong: #0f172a;
    --text: #334155;
    --text-muted: #64748b;
    --border: #e6e8f0;

    --r-sm: 10px;
    --r-md: 14px;
    --r-lg: 18px;
    --r-card: 24px;

    --sh-card: 0 1px 2px rgba(16, 24, 40, .04), 0 12px 32px -12px rgba(16, 24, 40, .18);
    --sh-button: 0 8px 20px -8px rgba(99, 102, 241, .55);
    --sh-hover: 0 20px 40px -16px rgba(16, 24, 40, .28);
    --focus-ring: 0 0 0 4px rgba(99, 102, 241, .18);

    --ease: cubic-bezier(.16, .84, .44, 1);
}

/* ----------------------- Base Setup -------------------------- */
body {
    margin: 0;
    font-family: 'Poppins', sans-serif;
    color: var(--text);
    background-color: var(--base);
    overflow: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Refined premium background: soft base + two subtle radial glows */
body::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(48rem 48rem at 12% -6%, rgba(139, 92, 246, .10), transparent 60%),
        radial-gradient(46rem 46rem at 108% 112%, rgba(99, 102, 241, .10), transparent 60%);
    z-index: -1;
    opacity: 1;
    animation: auraDrift 32s ease-in-out infinite alternate;
}

@keyframes auraDrift {
    from { transform: translate3d(0, 0, 0) scale(1); }
    to   { transform: translate3d(0, -1.2%, 0) scale(1.04); }
}

/* ----------------------- Login Layout ------------------------ */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    position: relative;
    z-index: 2;
    padding: 2rem;
}

.login-box {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid rgba(230, 232, 240, 0.9);
    padding: 3rem 2.5rem;
    border-radius: var(--r-card);
    max-width: 420px;
    width: 100%;
    box-shadow: var(--sh-card);
    animation: floatUp 0.9s var(--ease);
    transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.login-box:hover {
    transform: translateY(-4px);
    box-shadow: var(--sh-hover);
}

@keyframes floatUp {
    from { transform: translateY(24px); opacity: 0; }
    to   { transform: translateY(0); opacity: 1; }
}

/* ----------------------- Login Header ------------------------ */
.login-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.logo-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: var(--grad-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    animation: iconPulse 3s infinite ease-in-out, floatIcon 6s infinite ease-in-out;
}

@keyframes iconPulse {
    0%, 100% { transform: scale(1); }
    50%      { transform: scale(1.05); }
}

@keyframes floatIcon {
    0%, 100% { transform: translateY(0px) scale(1); }
    50%      { transform: translateY(-8px) scale(1.05); }
}

.login-header h1 {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--text-strong);
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.login-header p {
    color: var(--text-muted);
    font-weight: 400;
    font-size: 1rem;
}

/* ----------------------- Input Fields ------------------------ */
.input-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.input-group .input-icon {
    position: absolute;
    left: 1.25rem;
    top: 68%;
    transform: translateY(-50%);
    color: var(--text-muted);
    transition: color 0.25s var(--ease);
    pointer-events: none;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text);
    font-size: 0.95rem;
}

.input-group input {
    width: 100%;
    box-sizing: border-box;
    background: #f7f9fc;
    border: 1px solid var(--border);
    color: var(--text-strong);
    padding: 1rem 1.5rem 1rem 3.25rem;
    border-radius: var(--r-md);
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    transition: border-color 0.25s var(--ease), background 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.input-group input::placeholder {
    color: #a0aab8;
}

.input-group input:focus {
    border-color: var(--brand);
    background: var(--surface);
    box-shadow: var(--focus-ring);
    outline: none;
}

.input-group input:focus + .input-icon {
    color: var(--brand);
}

/* ----------------------- Login Button ------------------------ */
.login-button {
    width: 100%;
    background: var(--grad-primary);
    padding: 1.2rem;
    font-size: 1.1rem;
    border: none;
    border-radius: var(--r-md);
    color: white;
    font-weight: 600;
    letter-spacing: 0.02em;
    transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease);
    box-shadow: var(--sh-button);
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
}

.login-button:hover {
    background: var(--grad-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 14px 28px -10px rgba(99, 102, 241, .6);
}

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

.login-button:focus-visible {
    outline: none;
    box-shadow: var(--sh-button), var(--focus-ring);
}

.login-button i {
    transition: transform 0.25s var(--ease);
}

.login-button:hover i {
    transform: translateX(5px);
}

/* ----------------------- Error Message ----------------------- */
.error-message {
    color: var(--danger-deep);
    background: rgba(244, 63, 94, 0.08);
    border: 1px solid rgba(244, 63, 94, 0.2);
    text-align: center;
    padding: 1rem;
    border-radius: var(--r-md);
    margin-top: 1.5rem;
    font-weight: 500;
}

.error-message.hidden {
    display: none;
}

/* ----------------------- Responsive -------------------------- */
@media (max-width: 640px) {
    .login-box {
        padding: 2.5rem 1.5rem;
    }

    .login-header h1 {
        font-size: 1.9rem;
    }
}