:root {
    --bg-color: #0b0f19;
    --card-bg: rgba(22, 27, 34, 0.65);
    --card-border: rgba(255, 255, 255, 0.08);
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --secondary: #8b5cf6;
    --secondary-hover: #7c3aed;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --input-bg: rgba(15, 23, 42, 0.6);
    --input-border: rgba(255, 255, 255, 0.1);
    --input-focus: rgba(59, 130, 246, 0.5);
    --error: #ef4444;
    --success: #10b981;
}

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

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

/* Animated Background Blobs */
.background-blobs {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s infinite ease-in-out;
}

.blob-1 {
    top: -10%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #3b82f6 0%, transparent 70%);
    animation-delay: 0s;
}

.blob-2 {
    bottom: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, #8b5cf6 0%, transparent 70%);
    animation-delay: -5s;
}

.blob-3 {
    top: 40%;
    left: 40%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #06b6d4 0%, transparent 70%);
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -50px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

/* Layout */
.auth-container {
    width: 100%;
    max-width: 440px;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    margin-bottom: 2rem;
    transition: color 0.2s;
}

.back-link:hover {
    color: var(--text-main);
}

/* Card */
.auth-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--card-border);
    border-radius: 1.5rem;
    padding: 2.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.logo {
    width: 3.5rem;
    height: 3.5rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 1rem;
    font-size: 2rem;
    color: white;
    box-shadow: 0 10px 15px -3px rgba(59, 130, 246, 0.3);
}

.auth-header h1,
.auth-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.auth-logo {
    width: 3.5rem;
    height: 3.5rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 1rem;
    color: white;
    box-shadow: 0 10px 15px -3px rgba(59, 130, 246, 0.3);
}

.auth-header p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Tabs */
.auth-tabs {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 0.75rem;
    padding: 0.25rem;
    margin-bottom: 2rem;
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    padding: 0.75rem;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s;
}

.tab-btn:hover {
    color: var(--text-main);
}

.tab-btn.active {
    background: var(--card-bg);
    color: var(--text-main);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
}

.label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.label-row label {
    margin-bottom: 0;
}

.forgot-link {
    color: var(--primary);
    text-decoration: none;
    font-size: 0.75rem;
}

.forgot-link:hover {
    text-decoration: underline;
}

.input-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 1rem;
    color: var(--text-muted);
    pointer-events: none;
    flex-shrink: 0;
}

.input-wrap input {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 0.75rem;
    padding: 0.75rem 1rem 0.75rem 3rem;
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.2s;
}

.input-wrap input::placeholder {
    color: var(--text-muted);
    opacity: 0.7;
}

.input-wrap input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--input-focus);
    background: rgba(15, 23, 42, 0.85);
}

.input-wrap input:hover {
    border-color: rgba(255, 255, 255, 0.2);
}

.toggle-pw {
    position: absolute;
    right: 1rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    transition: color 0.2s;
}

.toggle-pw:hover {
    color: var(--text-main);
}

.form-hint {
    display: block;
    margin-top: 0.375rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Legacy selectors kept for compatibility */
.input-with-icon {
    position: relative;
    display: flex;
    align-items: center;
}

.input-with-icon i:first-child {
    position: absolute;
    left: 1rem;
    color: var(--text-muted);
    font-size: 1.25rem;
    pointer-events: none;
}

.input-with-icon input {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 0.75rem;
    padding: 0.75rem 1rem 0.75rem 3rem;
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.2s;
}

.input-with-icon input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--input-focus);
}

.toggle-password {
    position: absolute;
    right: 1rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    font-size: 1.25rem;
}

.toggle-password:hover {
    color: var(--text-main);
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-muted);
    cursor: pointer;
}

.remember-me input {
    accent-color: var(--primary);
    width: 1rem;
    height: 1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    border-radius: 0.75rem;
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.btn-block {
    width: 100%;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

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

.btn-secondary {
    background: var(--secondary);
    color: white;
}

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

/* Submit buttons used in login.php */
.btn-submit {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    border-radius: 0.75rem;
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    font-family: inherit;
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: white;
    transition: all 0.25s;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.35);
    margin-top: 0.5rem;
}

.btn-submit:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
    background: linear-gradient(135deg, var(--primary-hover), #1d4ed8);
}

.btn-submit:active {
    transform: translateY(0);
}

.btn-submit.btn-sa {
    background: linear-gradient(135deg, var(--secondary), var(--secondary-hover));
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.35);
}

.btn-submit.btn-sa:hover {
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.5);
    background: linear-gradient(135deg, var(--secondary-hover), #6d28d9);
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 0.75rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

/* Responsive */
@media (max-width: 480px) {
    .auth-container {
        padding: 1rem;
    }
    
    .auth-card {
        padding: 1.5rem;
    }
}

/* ── Footer de desarrollo (igual que admin) ── */
.oa-dev-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 999;
    text-align: center;
    padding: .35rem 1rem;
    font-size: .68rem;
    color: #475569;
    background: rgba(11,17,32,.88);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    border-top: 1px solid rgba(255,255,255,.05);
    pointer-events: none;
}
.oa-dev-footer a {
    color: #6366f1;
    text-decoration: none;
    font-weight: 600;
    pointer-events: all;
    transition: color .15s;
}
.oa-dev-footer a:hover { color: #a5b4fc; }