/**
 * AutoClipper Login Page Styles
 * =============================
 * 
 * Styles specific to the login/authentication page.
 * Requires variables.css to be loaded first in the HTML.
 */

/* ============================================
   PAGE LAYOUT
   ============================================ */

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

body {
    background: var(--gradient-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-family-primary);
    padding: var(--spacing-8);
    position: relative;
    overflow: hidden;
}

body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(0, 212, 219, 0.1) 0%, transparent 40%);
    pointer-events: none;
    z-index: 0;
    animation: backgroundShift 15s ease-in-out infinite;
}

@keyframes backgroundShift {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.9;
        transform: scale(1.05);
    }
}

body::after {
    content: '';
    position: absolute;
    bottom: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
    border-radius: var(--radius-full);
    pointer-events: none;
    z-index: 0;
    animation: floatBubble 20s ease-in-out infinite;
}

@keyframes floatBubble {
    0%, 100% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(-100px, -100px);
    }
}

/* ============================================
   LOGIN CONTAINER
   ============================================ */

.login-container {
    background: var(--color-white);
    border-radius: var(--radius-3xl);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.15), 
                0 10px 25px rgba(0, 0, 0, 0.1),
                0 0 0 1px rgba(0, 0, 0, 0.05);
    padding: 50px 45px 45px;
    width: 100%;
    max-width: 440px;
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    z-index: 1;
    backdrop-filter: blur(10px);
}

.login-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ============================================
   LOGIN HEADER
   ============================================ */

.login-header {
    text-align: center;
    margin-bottom: 40px;
}

.login-header .icon {
    font-size: 64px;
    margin-bottom: var(--spacing-6);
    animation: pulse 2s ease-in-out infinite;
}

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

.login-header h1 {
    margin: 0;
    color: var(--color-gray-800);
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-4);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-header .brand-name {
    letter-spacing: -0.5px;
}

.login-header p {
    margin: 0;
    color: var(--color-text-muted);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-medium);
}

/* ============================================
   FORM STYLES
   ============================================ */

.form-group {
    margin-bottom: var(--spacing-9);
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-3);
    color: var(--color-gray-700);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.form-group input {
    width: 100%;
    padding: 15px 18px;
    border: var(--border-width-2) solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-md);
    transition: all var(--transition-slow);
    background: var(--color-white);
    font-family: var(--font-family-primary);
    color: var(--color-gray-800);
}

.form-group input::placeholder {
    color: var(--color-gray-400);
    font-weight: var(--font-weight-normal);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    background: var(--color-white);
    box-shadow: 0 0 0 4px var(--color-primary-alpha-10), var(--shadow-sm);
    transform: translateY(-1px);
}

.form-group input:hover:not(:focus) {
    border-color: var(--color-gray-400);
    background: var(--color-gray-50);
}

/* ============================================
   LOGIN BUTTON
   ============================================ */

.btn-login {
    width: 100%;
    padding: 16px var(--spacing-7);
    background: var(--gradient-primary);
    color: var(--color-white);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-bold);
    cursor: pointer;
    transition: all var(--transition-slow);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    box-shadow: 0 4px 14px var(--color-primary-alpha-30);
    position: relative;
    overflow: hidden;
    margin-top: var(--spacing-4);
}

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

.btn-login:hover::before {
    left: 100%;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--color-primary-alpha-40);
}

.btn-login:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px var(--color-primary-alpha-30);
}

.btn-login:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
    box-shadow: 0 2px 8px var(--color-primary-alpha-20);
}

.btn-login:disabled::before {
    display: none;
}

/* ============================================
   ALERTS
   ============================================ */

.alert {
    padding: 14px 18px;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-9);
    font-size: var(--font-size-base);
    display: none;
    font-weight: var(--font-weight-medium);
    position: relative;
    overflow: hidden;
}

.alert.show {
    display: block;
    animation: slideDown 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.alert::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
}

.alert-error {
    background: var(--color-danger-bg);
    color: var(--color-danger-dark);
    border: var(--border-width-2) solid var(--color-danger-border);
    border-left: none;
    box-shadow: 0 2px 8px rgba(220, 53, 69, 0.15);
}

.alert-error::before {
    background: var(--color-danger);
}

.alert-success {
    background: var(--color-success-bg);
    color: var(--color-success-dark);
    border: var(--border-width-2) solid var(--color-success-border);
    border-left: none;
    box-shadow: 0 2px 8px rgba(40, 167, 69, 0.15);
}

.alert-success::before {
    background: var(--color-success);
}

/* ============================================
   LOGO
   ============================================ */

.logo-circle {
    width: 140px;
    height: 140px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-8) auto;
    box-shadow: 0 10px 30px var(--color-primary-alpha-20), 
                0 0 0 1px var(--color-primary-alpha-10);
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-gray-50) 100%);
    position: relative;
    animation: logoFloat 3s ease-in-out infinite;
}

@keyframes logoFloat {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-8px);
    }
}

.logo-circle::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    opacity: 0;
    z-index: -1;
    transition: opacity var(--transition-slow);
}

.login-container:hover .logo-circle::before {
    opacity: 0.1;
}

.logo-circle img {
    width: 85%;
    height: 85%;
    object-fit: contain;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.auth-links {
    margin-top: var(--spacing-6);
    text-align: center;
}

.auth-links a {
    color: var(--color-gray-600);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.auth-links a:hover {
    color: var(--color-primary-600);
    text-decoration: underline;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 480px) {
    body {
        padding: var(--spacing-6);
    }

    .login-container {
        padding: 40px 30px 35px;
        max-width: 100%;
        border-radius: var(--radius-2xl);
    }

    .login-header {
        margin-bottom: 35px;
    }

    .login-header h1 {
        font-size: var(--font-size-2xl);
    }

    .login-header p {
        font-size: var(--font-size-base);
    }

    .login-header .icon {
        font-size: 48px;
    }
    
    .logo-circle {
        width: 110px;
        height: 110px;
        margin-bottom: var(--spacing-7);
    }

    .form-group {
        margin-bottom: var(--spacing-8);
    }

    .form-group input {
        padding: 13px 16px;
        font-size: var(--font-size-base);
    }

    .btn-login {
        padding: 14px var(--spacing-6);
        font-size: var(--font-size-base);
    }
}