:root {
    --primary-color: #2f3a79;
    --primary-light: #4c5bb4;
    --accent-color: #00d2ff;
    --bg-color: #eaf0fd;
    --text-color: #2d3436;
    --glass-bg: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(255, 255, 255, 0.4);
    --shadow-soft: 0 12px 40px rgba(31, 38, 135, 0.1);
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body.login {
    margin: 0;
    padding: 0;
    background: linear-gradient(-45deg, #dfe7fd, #eef2f7, #e2e8f0, #eaf0fd);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-main);
    color: var(--text-color);
    overflow-x: hidden;
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.container-fluid {
    width: 100%;
    max-width: 440px;
    padding: 20px;
    z-index: 1;
}

/* Entrance Animations */
#logo_img {
    display: block;
    margin: 40px auto 15px;
    height: 70px;
    filter: drop-shadow(0 4px 6px rgba(0,0,0,0.05));
    animation: zoomInFade 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
}

.title_elm {
    color: var(--primary-color);
    text-align: center;
    font-weight: 800;
    font-size: 24px;
    margin-bottom: 35px;
    letter-spacing: -0.5px;
    animation: fadeInUp 0.8s ease-out 0.3s forwards;
    opacity: 0;
}

.panel.panel-default {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: var(--shadow-soft);
    padding: 35px;
    position: relative;
    overflow: hidden;
    animation: fadeInUp 1s cubic-bezier(0.16, 1, 0.3, 1) 0.5s forwards;
    opacity: 0;
}

.center {
    animation: fadeInUp 0.8s ease-out 0.8s forwards;
    opacity: 0;
    text-align: center;
    margin-top: 25px;
}

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

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

/* Floating Label Logic */
.form-group {
    position: relative;
    margin-bottom: 30px;
    text-align: right;
}

.form-group label {
    display: block;
    font-weight: 700;
    margin-bottom: 10px;
    font-size: 14px;
    color: var(--primary-color);
    transition: all 0.3s ease;
    padding-right: 5px;
}

.input-group {
    position: relative;
    display: flex;
    align-items: center;
    background: #ffffff;
    border-radius: 16px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid #e2e8f0;
    padding: 0 12px;
    flex-direction: row-reverse;
    box-shadow: 0 2px 4px rgba(0,0,0,0.02);
}

.input-group:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(47, 58, 121, 0.1), 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    transform: translateY(-1px);
}

.input-group-addon {
    padding: 14px;
    color: var(--primary-color);
    font-size: 22px;
    background: transparent !important;
    border: none !important;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.input-group:focus-within .input-group-addon {
    opacity: 1;
}

#tel_input {
    flex: 1;
    border: none;
    background: transparent;
    padding: 16px 12px;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color);
    outline: none;
    direction: ltr;
    text-align: left;
    width: 100%;
}

#tel_input::placeholder {
    color: #a0aec0;
    opacity: 0.6;
    font-weight: 400;
    transition: opacity 0.3s ease;
    text-align: right;
}

#tel_input:focus::placeholder {
    opacity: 0.3;
}

/* Modern Button with Shine */
#submit_elm {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: white;
    border: none;
    border-radius: 16px;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 4px 14px rgba(47, 58, 121, 0.3);
    margin: 10px 0 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-direction: row-reverse;
    position: relative;
    overflow: hidden;
}

#submit_elm::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -60%;
    width: 20%;
    height: 200%;
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(30deg);
    transition: 0.6s;
    pointer-events: none;
}

#submit_elm:hover::after {
    left: 120%;
}

#submit_elm:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 20px rgba(47, 58, 121, 0.4);
}

#submit_elm:active {
    transform: translateY(0) scale(0.98);
}

#submit_elm i {
    transition: transform 0.3s ease;
}

#submit_elm:hover i {
    transform: translateX(-5px);
}

/* Helpers */
.error {
    color: #e84118;
    background: #fff5f5;
    padding: 15px;
    border-radius: 12px;
    font-size: 14px;
    margin-bottom: 25px;
    border: 1px solid rgba(232, 65, 24, 0.1);
    font-weight: 600;
    text-align: center;
    animation: shake 0.5s ease-in-out;
}

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

.forgot-pass {
    display: inline-block;
    color: var(--primary-color);
    text-decoration: none;
    font-size: 16px;
    font-weight: 700;
    padding: 14px 28px;
    background: #ffffff;
    border: 2px solid #e2e8f0;
    border-radius: 16px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.02);
}

.forgot-pass:hover {
    background: #f8fafc;
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.05);
}

.right a {
    color: #64748b;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.right a:hover {
    color: var(--primary-color);
}

#error_cookies_message:empty, #error_javascript_message:empty {
    display: none;
}

#error_cookies_message, #error_javascript_message {
    background: #fff9db;
    color: #856404;
    padding: 15px;
    border-radius: 12px;
    border: 1px solid #ffe066;
    margin-bottom: 25px;
    font-size: 14px;
    text-align: center;
}

@media (max-width: 480px) {
    .container-fluid {
        padding: 15px;
    }
    .panel.panel-default {
        padding: 25px;
    }
}