:root {
    --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #311042 100%);
    --card-bg: rgba(30, 41, 59, 0.45);
    --card-border: rgba(255, 255, 255, 0.08);
    --input-bg: rgba(15, 23, 42, 0.6);
    --input-border: rgba(255, 255, 255, 0.12);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-start: #10b981;
    --accent-end: #06b6d4;
    --accent-hover: linear-gradient(135deg, #059669 0%, #0891b2 100%);
    --accent-glow: rgba(16, 185, 129, 0.25);
    --error-bg: rgba(239, 68, 68, 0.15);
    --error-border: rgba(239, 68, 68, 0.3);
    --error-text: #fca5a5;
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-gradient);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow-x: hidden;
    position: relative;
}

/* Ambient glowing background blobs for visual premium feel */
.ambient-glow-1 {
    position: absolute;
    top: 15%;
    left: 10%;
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.12) 0%, rgba(0, 0, 0, 0) 70%);
    border-radius: 50%;
    filter: blur(40px);
    z-index: 1;
    pointer-events: none;
}

.ambient-glow-2 {
    position: absolute;
    bottom: 15%;
    right: 10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, rgba(0, 0, 0, 0) 70%);
    border-radius: 50%;
    filter: blur(40px);
    z-index: 1;
    pointer-events: none;
}

.container {
    width: 100%;
    max-width: 480px;
    padding: 24px;
    z-index: 2;
}

.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 40px 32px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    animation: fadeIn 0.8s ease-out;
}

.header {
    text-align: center;
    margin-bottom: 32px;
}

.logo-area {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--accent-start) 0%, var(--accent-end) 100%);
    border-radius: 14px;
    margin-bottom: 16px;
    box-shadow: 0 8px 16px var(--accent-glow);
}

.logo-icon {
    font-size: 26px;
    font-weight: 700;
    color: #fff;
}

h1 {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #fff 0%, #cbd5e1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Form groups */
.form-group {
    margin-bottom: 20px;
    position: relative;
}

.form-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.input-wrapper {
    position: relative;
}

.form-control {
    width: 100%;
    padding: 14px 16px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    outline: none;
}

.form-control:focus {
    border-color: var(--accent-start);
    box-shadow: 0 0 0 3px var(--accent-glow);
    background: rgba(15, 23, 42, 0.85);
}

/* Error alert box */
.alert {
    background: var(--error-bg);
    border: 1px solid var(--error-border);
    border-radius: 10px;
    padding: 12px 16px;
    color: var(--error-text);
    font-size: 13.5px;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: shake 0.5s ease-in-out;
}

.alert-icon {
    font-size: 16px;
    flex-shrink: 0;
}

/* Button */
.btn-submit {
    display: block;
    width: 100%;
    padding: 14px 20px;
    background: linear-gradient(135deg, var(--accent-start) 0%, var(--accent-end) 100%);
    border: none;
    border-radius: 10px;
    color: #ffffff;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-align: center;
    box-shadow: 0 4px 12px var(--accent-glow);
    position: relative;
    overflow: hidden;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(16, 185, 129, 0.4);
}

.btn-submit:active {
    transform: translateY(1px);
}

.btn-submit::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: 0.5s;
}

.btn-submit:hover::after {
    left: 100%;
}

/* Footer links */
.footer-note {
    text-align: center;
    margin-top: 24px;
    font-size: 12px;
    color: var(--text-secondary);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

@media (max-width: 480px) {
    .glass-card {
        padding: 30px 20px;
    }
}