:root {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --bg-gradient-start: #0f172a;
    --bg-gradient-end: #1e293b;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --input-bg: rgba(15, 23, 42, 0.5);
    --input-focus: rgba(59, 130, 246, 0.2);
    --error-color: #ef4444;
}

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

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-end));
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

/* Background Animated Shapes */
.login-container {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.shape {
    position: absolute;
    filter: blur(80px);
    z-index: 0;
    border-radius: 50%;
    animation: float 20s infinite ease-in-out alternate;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: rgba(59, 130, 246, 0.4);
    top: -100px;
    left: -100px;
    animation-delay: 0s;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: rgba(139, 92, 246, 0.4);
    bottom: -50px;
    right: -50px;
    animation-delay: -5s;
}

.shape-3 {
    width: 250px;
    height: 250px;
    background: rgba(236, 72, 153, 0.3);
    top: 50%;
    left: 60%;
    transform: translate(-50%, -50%);
    animation-delay: -10s;
}

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

/* Glassmorphism Card */
.login-card {
    position: relative;
    z-index: 10;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 3rem 2.5rem;
    width: 90%;
    max-width: 420px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transform: translateY(20px);
    opacity: 0;
    animation: slideUpFade 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideUpFade {
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.login-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.logo-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: inline-block;
    filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.3));
    animation: pulse 2s infinite;
}

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

.login-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.025em;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    padding-left: 0.25rem;
}

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

.input-icon {
    position: absolute;
    left: 1rem;
    font-size: 1.2rem;
    color: var(--text-secondary);
    pointer-events: none;
    transition: color 0.3s ease;
}

.input-wrapper input {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 0.875rem 1rem 0.875rem 3rem;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
}

.input-wrapper input::placeholder {
    color: rgba(148, 163, 184, 0.5);
}

.input-wrapper:focus-within .input-icon {
    color: var(--primary-color);
}

.input-wrapper input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px var(--input-focus);
}

.error-message {
    color: var(--error-color);
    font-size: 0.85rem;
    text-align: center;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    padding: 0.75rem;
    border-radius: 8px;
    display: none;
    animation: shake 0.5s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}

@keyframes shake {
    10%, 90% { transform: translate3d(-1px, 0, 0); }
    20%, 80% { transform: translate3d(2px, 0, 0); }
    30%, 50%, 70% { transform: translate3d(-4px, 0, 0); }
    40%, 60% { transform: translate3d(4px, 0, 0); }
}

.login-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 12px;
    padding: 1rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    margin-top: 0.5rem;
    position: relative;
    overflow: hidden;
}

.login-btn::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: all 0.5s ease;
}

.login-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -10px rgba(59, 130, 246, 0.7);
}

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

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

.btn-arrow {
    transition: transform 0.3s ease;
}

.login-btn:hover .btn-arrow {
    transform: translateX(4px);
}

.login-footer {
    margin-top: 2rem;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.login-footer strong {
    color: var(--text-primary);
}