:root {
    /* Colores principales - Estilo MEDILINE */
    --primary: #0FD186;
    --primary-dark: #0AB871;
    --secondary: #5AC8FA;
    --background: #F8F9FC;
    --surface: #FFFFFF;
    --text-primary: #2D3748;
    --text-secondary: #718096;
    --success: #48BB78;
    --warning: #F6AD55;
    --error: #F56565;
    --border: #E2E8F0;
    
    /* Sombras */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px rgba(0, 0, 0, 0.15);
    
    /* Transiciones */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* SPLASH SCREEN */
.splash-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #0FD186 0%, #0AB871 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    transition: opacity 0.5s ease-out;
}

.splash-screen.fade-out {
    opacity: 0;
    pointer-events: none;
}

.splash-content {
    text-align: center;
    animation: splashFadeIn 0.8s ease-out;
}

.splash-logo {
    width: 300px;
    height: auto;
    max-width: 80vw;
    animation: splashPulse 2s ease-in-out infinite;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.2));
}

.splash-loader {
    margin-top: 30px;
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: splashSpin 1s linear infinite;
    margin-left: auto;
    margin-right: auto;
}

@keyframes splashFadeIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

@keyframes splashSpin {
    to {
        transform: rotate(360deg);
    }
}

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: #FFFFFF;
}

.login-box {
    background: var(--surface);
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    padding: 40px;
    width: 100%;
    max-width: 400px;
    animation: slideUp 0.5s ease;
    border: 1px solid var(--border);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-logo {
    width: 240px;
    height: auto;
    margin: 0 auto 24px;
    position: relative;
}

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

.logo-gradient {
    width: 100%;
    height: auto;
    background: none;
    border-radius: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: none;
    position: relative;
    animation: logoFloat 4s ease-in-out infinite;
    padding: 0;
}

.logo-gradient::before {
    display: none;
}

@keyframes shine {
    0% {
        transform: rotate(0deg) translate(-50%, -50%);
    }
    100% {
        transform: rotate(360deg) translate(-50%, -50%);
    }
}

.logo-gradient i {
    font-size: 48px;
    color: white;
    z-index: 1;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.login-logo i {
    font-size: 40px;
    color: white;
}

.login-logo .logo-img {
    width: 100%;
    height: auto;
    object-fit: contain;
    padding: 0;
    filter: none;
    z-index: 1;
    display: block;
}

.login-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

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

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 14px 16px;
    font-size: 16px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface);
    color: var(--text-primary);
    transition: var(--transition);
    font-family: inherit;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(15, 209, 134, 0.1);
}

.form-input::placeholder {
    color: var(--text-secondary);
}

.btn {
    width: 100%;
    padding: 14px 20px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-primary:disabled {
    background: var(--text-secondary);
    cursor: not-allowed;
    transform: none;
}

.alert {
    padding: 12px 16px;
    border-radius: 12px;
    margin-bottom: 20px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideDown 0.3s ease;
}

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

.alert-error {
    background: rgba(255, 59, 48, 0.1);
    color: var(--error);
    border: 1px solid rgba(255, 59, 48, 0.2);
}

.alert-success {
    background: rgba(52, 199, 89, 0.1);
    color: var(--success);
    border: 1px solid rgba(52, 199, 89, 0.2);
}

.hidden {
    display: none !important;
}

/* Loading spinner */
.spinner {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Responsive */
@media (max-width: 480px) {
    .login-box {
        padding: 30px 20px;
    }
    
    .login-title {
        font-size: 24px;
    }
}

/* ── Divisor "¿No tenés cuenta?" ── */
.login-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 20px 0 14px;
    color: var(--text-secondary);
    font-size: 13px;
}
.login-divider::before,
.login-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

/* ── Botón registrarse ── */
.btn-register {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
    text-decoration: none;
    font-weight: 700;
    letter-spacing: .2px;
    transition: var(--transition);
}
.btn-register:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(15, 209, 134, .25);
}
.btn-register i {
    font-size: 15px;
}